The philosophy of using it is that eventually, in the long long term, the productivity gains should be reasonable or at least competitive with any other editor or environment. It should be a joy to use. Since I know I will probably only ever make a living crafting text I view it as an imperative to deeply master my primary tool. The other aspect is that it is free and old and stable. I can't ever achieve an RMS level of using open source things, but everywhere I can, I want the truly open thing, even if it isn't practical. I run Linux for this reason, even though it was a giant time sink making it behave and getting everything just so. But I can make things just so.
This fits in also with creating a distraction free environment. i3wm, emacs, I barely even see application menus these days, but I still use a GUI, I am not crazy. But it fits with my philosophy/religion of computing, so I am going to do it this way. If others agree, great. If they want to know about it, I will share. If they think it's crazy, from their perspective they may be right!
Sublime isn't perfect and it still requires tinkering from time to time, but its power vs. time investment equation is absolutely fantastic. It's a very get-shit-done style of editor. Emacs/vim are amazingly powerful but they are also big time sinks, both in terms of the initial learning curve and later customization.