I switched from emacs to vim a few years ago. I'm happy I did it. I think you need a concrete reason to switch. I also switched to the emacs key bindings. I figure if you are going to use an editor you should use it as intended, but that's personal preference. Plenty of people are happy with evil.

My specific reason was I wanted to be able to run commands asynchronously in a separate buffer, rather than switching back and forth between the editor and a terminal. The other reason is I think vimscript is terrible, and I didn't want to learn it to customize the editor. Elisp is much nicer, and the documentation is fantastic.

I've heard VIM has since gained async buffers, but not lisp.

As for knock on benefits, there is really a fantastic ecosystem of applications built for emacs that I can't imagine are possible for most other editors. This is because emacs is a lisp runtime that happens to include an editor. So it has a built in terminal, email client, irc client, Tramp mode, Org mode, etc.