Haven't used an IDE ever since I got used to vim and installed some basic plugins like YCM. Everything else feels too slow.
Most of that stuff is proprietary and cannot be plugged into terminal.
The only attempt I’ve seen was actually by Jetbrains with Resharper beta for vscode
I also highly doubt that any IDE, whatever that is, is better at analyzing Rust code than rust-analyzer is. Not every language will have a language server that excellent, but I hope that'll improve for those users.