Earlier quoted context omitted.
Release or not release is just a name. You shouldn't let that be a factor. In my experience it is absolutely stable and as bug free as software can be. However, I'm not sure how well maintained it is. I fear all the time that the author, jps, has quit, but then every few months he has a development sprint and releases a new version. I'd rather have it permanently called "beta" but a minor update every month, than one…
That's true. Sublime 3 never felt like "beta" software. But as somebody said below, I am afraid of people quitting and leaving it to die slowly (like TextMate died) and that's the reason why I was hesitate to buy it for so long. Nobody guarantees if the developers drop the ball for some hypothetic reason thing will go open source, even that is not guaranteeing anything (again TextMate's case).
Textmate is still in development and has a good few releases a year. Last commit was a month ago but I think Allan likes to work a few months then have a few off.