Comment by Conscat

A loss of functionality, but arguably a good thing, e.g. moving will never throw an exception/panic so you don't need an equivalent to is_nothrow_move_constructible

I sure don't miss the footguns and raw boilerplate that is having a copy constructor, move constructor, copy assignment operator, move assignment operator, and destructor, per class.

Yes, you should avoid the manual memory management that necessitates writing them. But work with a team of developers fresh out of school and next thing you know your codebase will be brimming with this kind of busywork.