Sounds like you're unaware of LSP (Language Server Protocol). "Proper code intelligence" is absolutely something that an editor+plugins can provide, and LSP means that intelligence can be developed once and used with many editors, rather than "integrating" the editor with the code analysis so your choice of one dictates your choice of the other. LSP is just one of those things that makes sense, turning something quadratic into something linear.

I don't care at all if someone prefers IntelliJ over Emacs (that's a pure matter of taste) but the idea that it's impossible for an editing environment that isn't delivered as a single, integrated monolith to expose powerful language-specific tools such as interactive lints, large scale refactorings, debuggers (check out DAP for the debugging equivalent of LSP), etc was never true as a technical matter and is increasingly untrue in the real world.

One of the best developments in dev tooling in recent years is that it is starting to be seen as the norm for new languages to provide canonical language server implementations. Long may that trend continue.