Ah, Jetbrains must be touching a different part of the elephant. My related experience is with compiling C++ programs meant for human people to run on their own home computers. I imagine internal company dev projects like Jetbrains would cover don't care nearly so much about compatibility.

Also I note that 25%+ of the Jetbrains 2023 survey use C++11 or older. And 50% of Jetbrains survey devs say "No, I don't plan to move to another C++ standard" from C++11. So it's likely that 25% will stay high.