How can std::aligned_storage expose correctly aligned storage for any object?

Question

The std::aligned_storage structure provides a type typedef that at least according to cppreference:

Provides the member typedef

Answer 1

Per [meta.trans.other]/2,

It is implementation-defined whether any extended alignment is supported.

It's pretty annoying when they specify stuff like this after the big table without a pointer. I've just added the sentence to cppreference.