It's where I write all of my personal notes, blog posts, and it's where I wrote both "Game Programming Patterns" and "Crafting Interpreters".
At the same time, it's not the tool I use as an IDE. For programming, I use whatever IDE is dominant for the language I'm working in. Over time, that's been Visual C++, Visual Studio, XCode, Eclipse, IntelliJ, and most recently VS Code.
That doesn't mean to me that I want Sublime to turn into an IDE. I like that it's lighterweight than that. It's the perfect sweet spot for me of rich enough to handle piles of notes and documents and small scale code editing, but not so huge and cumbersome that it gets in my way.
Are people just working on more complex software than I am so you need the build steps hidden behind a UX, or am I missing some killer IDE feature that I don't even know about?
EDIT: It probably helps that I'm a vim die-hard and couldn't imagine clicking on something to rebuild the program! And Sublime's Vim support is better than any real vim program I've ever used, much less the half-hearted versions available in the IDEs I've tried. Maybe that's the main disconnect, and y'all just prefer having dropdown menus?
In some cases we are forced to use a specific IDE. Not optional.
But in all seriousness a good IDE is much more than a text editor and buttons which run terminal commands. The main thing a good IDE has is a good debugger, which not only allows for stepping through code easily, but also shows the values of variables, memory, registers, in one easy to use interface.
If you don't use a debugger then either you're only building very simple programs, or you're stuck in some sort of special hell when it comes to debugging.