That sounds like a good approach when you need 5 features. But for development the number is probably in the hundreds and I have no time to try to manage all that.

Besides many features are simply not available for editors like emacs. As an example, data flow analysis warns you about logical mistakes in your code (e.g. dereferencing nullable variable without a check first). This happens as you type, the closest you can get without an IDE is probably running it on some static analysis tool in your CI => getting feedback an hour later.