Sunk cost fallacy. Sublime Text doesn't cost any more for people who have already paid for Textmate than for people who haven't. It doesn't have fewer features,

Sunk cost fallacy. Sublime Text doesn't cost any more for people who have already paid for Textmate than for people who haven't. It doesn't have fewer features, or run slower, or crash more, or look worse, for people who have already paid for Textmate than for people who haven't. The only thing that's different for people who've already paid for Textmate is that they already have Textmate. That might, indeed, make Sublime Text less valuable to them. But the person you're replying to already knows that, and is asking: What reasons might I have for not switching?.