When I joined FAANG #1, JetBrains wasn't an option, and all of our work had to be done on remote servers, with code bases big enough that indexing took on the order of hours. Meanwhile there have been internal communities at all of my companies for Vim and Emacs to make them work in these environments, write plugins for various company services, etc. None of the editors or IDEs we are talking about struggle with any of the common tasks you mentioned, what something like Vim allows is extensibility and portability, and communities that support it no matter where you need to use it.

I do believe that for some use cases, like a person who unfortunately only works with Java or Android, JetBrains makes sense and is probably your only option. I believe outside of those environments, JetBrains offers no tangible benefits and plenty of downsides - cost, resource consumption, can't be run in a terminal, not easy to work with remote machines.

By the way, vim already has built in support for cscope, ctags, autocomplete, terminal windows, gdb debugging, if you work on a C-like project, it already is an IDE. With one plugin (Ale) which takes one line of config, you get an actual IDE that can auto-detect LSPs which offers refactoring, code actions, etc. that is the exact same you would get in an IDE. But for very large projects, I have found that CLion and Clangd both take far too long to index, and so having an editor that works without indexing is a huge plus.