Which paradigm do you even refer to? Lifetimes? A C++ developer who cannot understand lifetimes (at least conceptually) in a day is a terrible developer.

I would know, I work with such people.

To answer your first question, I’ve definitely spent days of my life trying to fix c++ templates because the compiler won’t fucking tell me what’s actually wrong. It loves telling me some unrelated copy constructor is deleted though… And all of that is actually worse with new stuff like ranges. Which are great on paper, but are a maintainability nightmare.