Also they're operators.

I understand C++ has a lot of operators which are variously reserved but not standardized ("asm") largely obsolete but still needed because of perverse C programmers ("goto") still reserved long after their usefulness subsided ("register") or for ideas that are now abandoned ("synchronized") not to mention all its primitive types ("double", "signed", "long", "short", "char8_t") and redundant non-textual operators given ASCII names like ("and_eq", "bitand", "xor")

But it also has dozens, like new and delete which look like features you'd want. So kinda makes sense to at least mention them in this context.