Wow. That is a cool. My limited experience working with single-threaded game-stuff tells me it is exceptionally hard to port stuff that is written without threading in mind, to multi-threading. Getting the behavior to stay the same while still actually getting better performance requires some really deep insight into how stuff works in the program. On a (program-)global scale. Mad respect if it works out. This should make huge maps or huge fortresses possible.

I haven't yet played the steam version (it is on my todo-list though), but sank quite some hours into the "legacy" version. It can become laggy if you play on big maps with a lot of dwarfs/critters etc on it. I am excited to have even more stuff possible in this already very complex and huge game.