Well TextMate was cool while it lasted. Good thing I switched to Sublime Text 2 a week ago.
So you think open-sourcing is a death sentence? Care to share your reasons? (genuine question)
TextMate is dead simply because everyone's already written it off. Some people are still on TextMate 1.5 because of the strength of the product, but it's been hemorrhaging users for years, and the TM2 alpha has been underwhelming to say the least.
I mean it's really hard for someone who wasn't around at the time to grok how amazing TextMate was at its release. I first saw it in the Rails demo and was like "what is that, I've got to try it right now". For all the build-up that TM2 had, after that long a wait it needed to pack a serious punch like that to reinvigorate people. Instead it just seemed buggy and slow and not something you'd want to do serious work in.