They have their own Linux distribution, all these years after the lawsuit they have become a Java distribution provider, recently added their own Go build for Azure, speaking of which, even if powered by Hyper V/Windows Host OS, 60% of Azure workloads are Linux based, more so if count ChatGPT/CoPilot stuff.
Then there is Github holding a big deal of FOSS universe as well.
VSCode and its forks used by cloud providers as Web IDEs, completly outshadow vim/emacs clones, to the point JetBrains felt pressured to come out with Fleet.
Their sales champions in 2023 were XBox, Azure and Microsoft 365.