Honestly, this sounds like a good way to accidentally a city if you start doing it in quantities large enough to actually noticeably impact the amount of warpstone in the world. And that's without the temptation that stockpiling enough warpstone to effectively turn this into an industrial process would represent to dark magic users, or the massive target it'd paint on the facility for skaven.
Yeah, it's kind of borrowing future troubles when you have enough of them already. Warpstone contamination
is a problem, but in the vast majority of places it's much less of one than ambient dharr. In the few places were it isn't, moving it a place you don't care too much about is a low cost solution.
Solving the warpstone problem at scale is something that future Mathilde might eventually get around to, but if that solution is based on first transitioning it back to gas dhar, then we first need the infrastructure for that. And as mentioned earlier, if you get rid of the ambient dhar, the warpstone does seem to eventually, slowly, go away (which it might not without sucking that up, evaporation pressure could be a thing that keeps it stable). So keep doing what we're doing, and in 40 turns or so we can take a look and see if there's cause to do something further with it.
Anyway, my personal problem with this discussion is that we're leaving out the properly deranged options, yes yes. Why not pile up a bunch of warpstone, open a portal to the aether, and chuck it through? You can get rid of it super fast that way. If you gather enough, you won't even have to open that portal manually! And you might get presents chucked back the other way.
Or you trade-offer. Get lot's of shinies-book. We'll take good care of the warpstone, yum yum.
Caledor in his vortex a bit like the emperor on his throne.
Huh, he even had a terrible son that ruined everything because of daddy issues.