JetBrains has been making IDE for a decade. They were the only company that actually made money by selling IDE. So I assume they have the best programmers who understand IDE.
However they fail to make a Cursor competitor so far. This alone suggests it's a harder task than meets the eye.
It is, but you are assuming that only a well known IDE team would do it. To me JetBrains is the least likely to be an innovator here because they depend on their reputation for being a mature technology.
Someone like me isn't known at all but it means I have been able to experiment for a long time without pressure, which is how you do real innovation.
JetBrains as a company probably owns 10 million lines of code and it's just really hard to move fast when you're tugging that kind of ball and chain
However they fail to make a Cursor competitor so far. This alone suggests it's a harder task than meets the eye.