> At $WORK we have libraries that are use std=20 features (...) That's specified at the package/project level. You're inadvertently proving my point. > (...)

> At $WORK we have libraries that are use std=20 features (...) That's specified at the package/project level. You're inadvertently proving my point. > (...) and only expose a c++=14 interface because that's what expected by our clients. That's also configured at the package level, because the interface headers need to be included in translation units from projecta configured tu be C++14. Again, you're also inadvertently supporting the point I made.