I do almost all my development on JetBrains IDEs (Rust, Python, Kotlin). IME they are unmatched for giving you code insights and suggested fixes (combined with "click here to do that") out of the box. But they are absolute resource hogs and I don't trust that they (or their best features) will always remain free.
I've tried to get into neovim a few times. It's fine for basic editing and I use it a bit when I am ssh'd into a box without a graphical environment, or I'm just not bothered booting up a full IDE. But the UI still feels less intuitive to me than JetBrains, and by the time I've installed and configured the various plugins that should give me anything approaching JetBrains' functionality the whole setup feels very fragile, like it could break at any moment and I wouldn't easily be able to fix it. In the regard, Helix having more stuff OOTB feels like it could be a definite improvement.
I've tried to get into neovim a few times. It's fine for basic editing and I use it a bit when I am ssh'd into a box without a graphical environment, or I'm just not bothered booting up a full IDE. But the UI still feels less intuitive to me than JetBrains, and by the time I've installed and configured the various plugins that should give me anything approaching JetBrains' functionality the whole setup feels very fragile, like it could break at any moment and I wouldn't easily be able to fix it. In the regard, Helix having more stuff OOTB feels like it could be a definite improvement.