No way have we predicted the last dozen great comets. That's impossible.
Spirit Talkers had predicted every single Great Comet which happened during their lifespan.
According to Academia Nut, the Spirit Talkers were older than us, and had been taking Study Stars every turn without fail to keep up with their Mysticism expenses to keep up with their Martial expenses.
They had been trying to Study Stars their way out of an unspecified "Farming problem", which we now suspect to be a superstition that they were unwilling to spend Stability on.
In many ways it's speculation, but the speculation is both well founded and notably does not apply to every megaproject.
The thing that makes this current megaproject special is that we're, well as far as I can tell we're basically founding an actual religion, rather than several individual practices that are based on how the locals are working. Rushing it would certainly make this done
differently, and quite likely to a detriment, though we'd still get something amazing. Remember, we do have to still guess at how things work beyond the numbers.
A vague guess as to the benefits of not rushing for various megaprojects would be:
- The Games- The entire thing about this is setting up organizational skills to run something like the Olympics. Doing it slow will allow us to notice the flaws with greater ease. Likely to benefit from spacing it out, but not definitively.
- Grand Palace- This is most likely a complete rework of our government, maybe even going so far as to advance it an entire age. Going slow will help us more safely iron out any problems, so it will likely have immense benefits to take this as slow as possible.
- Great Dam- Dam failures are a thing, and making sure it can stand up to the test of time might mean taking it somewhat slow. We're exceptionally good at these things, though, so taking it super slow won't be of major benefit, and one could argue that making it fast would limit the catastrophes we cause making it. We might want to take it slow until we discover some basic techniques for making it better, but rushing shouldn't hurt, so the benefit won't be that immense to take this slow, if it exists at all.
- The Library- Rushing may make this unorganized and the stories not very well kept, but that's mostly looking for a problem rather than truly acknowledging one. Stories change so often now that such an event won't truly matter anyways, that's the entire point of the Library. It's unlikely we will gain a major advantage by doing it slowly (Unless doing it fast causes us to drop so fast in art and mysticism that a golden age we are in crashes, do they work like that? Did we ever find out what the other condition to ending a golden age was?)
- The Mountain- No major gains will be done by doing this slowly. It's basically an engineering experiment.
- Place to the Stars- We want a good understanding of the stars in order to make this strong. Having a strong Study Stars chain should make this much more powerful, so as long as we have and maintain one, rushing should be just as strong as doing it slowly.
So, yeah, about the only ones that would truly benefit from taking it slow would be The Games and Grand Palace, according to the current theories. It is also best to look at it as 'what truly benefits from doing things slowly' rather than what is punished by it.
Well examples:
-Rushing Grand Temple meant that
all the religious strife of sorting out the religion happens at once. So:
--Location. Politicking for the Temple site had been somewhat agitated. We avoided any trouble from this by picking an already spiritually significant location, but a Stability roll was implied if we had any major dissension or if we had put it into Valleyhome.
--Chief Idol. Our shamans got into brawls over this, enough that the King had to send warriors to break up brawling shamans long enough to get them to agree on something. There was a possible Stability hit here, but we rolled well, so people were more confused than anything.
--Depictions. Our shamans got into MORE brawls over this.
Suffice to say that rushing the temple could very well lead to a religious schism we would have to work through, leading to less diversity of choices(mechanically, the 8 questions we were asked over the shrine construction period would have been compressed into likely 2 questions with Stability hit risks as shamans factionalized)
So, going through our megaproject listings:
-Saltern - Minor consequences from rushing. We missed some innovation rolls we could have gotten if we took it more slowly as people might figure out pumps, mortars and the like over the process, but nothing BAD.
-Garden - Same as Saltern. We missed some advances like waterproof mortars and pumps, but overall we made it work via bloodymindedness.
-The Games - Category here falls under Saltern. While a big centralized festival has a lot of logistics needs, we already have most of those, so rushing this might mostly lead to less initial diversity in the games involved in favor of more simplistic contests.
-Grand Palace - Rushing here is rushing governmental reform, as we'd need to reconfigure our entire administration to account for it's facilities, who gets access, who gets to live in it, whether the King's extended family should move in, what records should be stored, what layouts are better, etc. We've already seen what happens with taking government reform too quickly, so it's best done the slow way.
-Great Dam - Rushing this works fine...once we sit it long enough to get the innovations we need to make it safe: Foundations, Mortar, Tiling(i.e. stacking blocks with an offset for construction strength vs pressure). Three turns on slow and then switching to fast should do it.
-The Library - It's gathering knowledge from across the country to consolidate. We can expect some of this to be resolved due to the Great Temple, since we'd have a center of religion to define What Is Truth, but rushing it probably means less rigor over what CONTENT makes it in because of the sheer number of scribes with less oversight being practical.
-The Mountain - Pure engineering/logistics project. Rush it, all you get is missing out on some innovation rolls at worst.
-Place to the Stars - Assuming we kept up our Study Stars streak long enough, I don't see any problems with rushing it. Otherwise the measurements are liable to be off. Astronomical events go on a very long clock.