I'm pretty confused by the product positioning. If Fleet is built on the same technologies as other Jetbrains IDEs, describes itself as an IDE, and is natively polyglot, why shouldn't it replace the other language-based IDEs? From the marketing material, it's not clear to me the value proposition of, for example, IntelliJ compared to Fleet.
Maybe eventually the other IDEs will evolve into Fleet. But in the meantime, I can see why they'd want to avoid spooking their existing customer base into worrying that their investment in existing tooling is at risk.
