People, there is a VERY obvious solution to all of this that was glanced on but not actually discussed.
See, every time a new version comes out, it breaks things like DF Hack and Dwarf Therapist. And those crews figure out the changes they need to make, and they make them. New version comes out. Now, I'm sure Toady has someone in mind for when he does need help. He could give them the code, tell them to optimize it wherever they can, and release it as a mod like all the other utilities that are out there. Call it DF Optimized!
Yes, I know, such things take a looooong time. But you know what else happens every time Toady makes a new release? Bugs. And complaint threads worse than this one where somebody actively bitches (this one isn't actually a bitch fest and if these threads are done RIGHT and encourage us thinking like I'm doing now, they'd honestly be a great thing) before saying "I'm going back to version (enter number here) where you actually got it right." So we know right off the bat that even if DF Optimized version .42 didn't come out for another year when DF regular got its own update, there would still be a playerbase for it. Heck, probably a big one. Because when you're given a choice between "Buggy as Hell experimental version that could be an enjoyable new game" and "Upgraded but otherwise familiar older version" there's a high chance you'll check your hard drive space before downloading both and enjoying them.