Not specific functions, but as said elsewhere, the language is a mine field that too many joyfully walk upon.

Look up e.g. pointer aliasing. I’d bet most of my colleagues don’t have a clue about that (not a risky bet given the crap they write). Thankfully compiler writers know the majority of their users are too lazy to learn the stupid standard in this case (I don’t blame them). But not necessarily in other ones.

C++ is a tool designed for expert but used by everyone’s Grandma, with the results you could expect.

You’re being obtuse. Obviously the point above is about the difficulty to actually include GPL libraries in your codebase, not the fact that the company is unwilling to give money. Ever looked at a node_modules folder?