The advatage might be they can ensure the compiler supports the new features qt wants to use.
reflection could replace moc, (likely c++29 needed) but if compilers don't implement that part of reflection qt can't use it. If qt can get compilers updated that helps them.
reflection could replace moc, (likely c++29 needed) but if compilers don't implement that part of reflection qt can't use it. If qt can get compilers updated that helps them.