In my opinion, the IDE interface still has not been beaten if you are working on a serious codebase where you are reviewing each diff.

Decent analogy in 2nd sentence BUT the 1st doesn't hold water. TIMTOWTDI, statements about "everyone" or "no one" are highly suspect, and the trend of code-assist -> agentic -> delegated / orchestration is just that (a trend), not a universal law. Even in a full-on maximalist yolo paperclip future, many experts will likely ALWAYS want access to a decent IDE. (Note I'm not saying Cursor is necessarily that IDE, and I'm not commenting on the valuation.)