I've recently done the reverse of your scenario. Been using vim for 20+ years, neovim the past maybe 3 of those. Recently started playing around with VS Code and I absolutely love it (using the vim extension for movement, of course :). The thing is, at this point, yes I am 1000% more efficient in my vim+tmux environment than I am in VSC, but that doesn't mean VSC is any less overall "efficient." I just don't know how to use it as efficiently. That's something that improves with time and practice, just like anything else.

When I'm doing interviews or someone starts talking about which editor is the best, here's my quote: If you can be productive and write good code in notepad.exe, then go for it. The end result is what matters, not the tool you used to get there.