Thats just plan incorrect. JetBrains lets you do the following, out of the box:

- Edit Code - Debug Said Code - Run Said Code - Manage your repo via Git, SVN, or Perforce - Has GitHub integration built in - Has PlantUML integration for creating UML diagrams via their markdown editor (its pretty nifty and I believe now bundled by default) - Connect multiple SSH sessions - Connect multiple SFTP sessions (semantics right)

and so on and son on..I can even do remote editing as if its there, righ tin front of me. you can't even tell if the filesystem is remote because of how it populates in the IDE.

So please, what doe sit not actually do again?

and via plugins, (and a plugin ecosystem that tends to be well manicured/maintained, at that), you can add an LSP or many other languages that are supported. I've tried many many editors, and JetBrain IDE plugins are some of the highest quality i've ever worked with.

So please, tell me, what do they not do again?