I don't care. And neither should any other programmer. If ST2 is going to be abandonware a few years down the line like Textmate is right now, that doesn't matter at all to me. $60 for a piece of software that I spend 1500+ hours a year working from is a steal. If it gives me a 5% performance boost, I'll gladly take the afternoon and convert to it, whether it's open source or proprietary.

I currently use vim & MacVim for all my programming needs, because I'm at my peak of programming performance while using them. With the very quick turn-around on ST2's builds, and tons of features coming out every month, I'm strongly reconsidering a switch. Knowing vim is still invaluable knowledge for general sysops, but like I said, I'd gladly give it up in daily usage for something better.