I don't recall the second one? And I think we've improved the shields since. But psy shields (with the breakage aspect resolved, that is) are enormously valuable to chaos-fearing sorts. At least, if they believe they do what they actually do.
Of course, like most Vita trade goods, they're elite goods that won't directly benefit most people.
Though really I would hesitate to worry about trade goods when we currently have zero candidates to trade with that way. (Half of one if you count the Space Marine pocket empire, but we can't realistically make contact with them by choice with our current navigation limits.)
I'm mostly thinking about the Eldar as far as trade goes - We'd need to grow our navigator to find anyone else (or go to their main hub), though I still want to, of course. There's also the deal where, as a crossroads, people are going to show up at Denva, they'll come to
us, and having exotic goods to send them away with will build ties that are good to have.
Neablis didn't say anything directly on trade good value? It's just... directly observable. 50 plasma guns, something so below our level of abstraction we got it for free, was a "princely gift". Psychic shielding meanwhile is one of the most expensive blueprint modifications we have, and is just as expensive to maintain.
Which is to say, at the moment we can produce more trade value with orders of magnitude less BP by selling anything
but psychic shielding.
Unless we both make it self-repairing and cheap for us to produce, that's not changing. And getting those two things takes lead time - we have to start in advance
As for tech too dangerous for them to have right now, I spent a while discussing an example (alternate shield meanings), and just got a new reply about it:
I suspect that, should people have their design-integrated shields, that would not cause that much destruction... and they and their cell would be immediately flagged and destroyed.
This wouldn't get Denva the ability to hand everyone a personal shield on its own, so people would get caught out in the open - and some household shields would fail before a response quashes the problem.
And even if that doesn't happen, corruption affects objects and environments, not just people. Chaos corruption is often called 'evil radiation' - and just like nuclear material, the ability to produce it has to be tightly monitored because responding quickly to a nuclear meltdown or a dirty bomb after it's already started still leaves you with a whole lot of city turned into an uninhabitable zone.
And because this is a machine doing it... well, I pointed this out before too, right? The cell doesn't have to be
there when it turns on. Cultists can just... set activation timers, and leave. For the same reason, several shields can turn evil all at once to overwhelm surrounding, non-corrupted shields.
If you could download a dirty bomb in real life, we wouldn't be having this conversation, we'd probably just be dead. But it may become an actual possibility for Denva when alternate shield meanings is developed, if we don't have machine-spirit controlled psy shields first.
