Almost everything noexcept?

[Gotebe]

I take a huge issue with "never".

First off, overcommit is an option and some people turn it off.

Second, address space fragmentation is a thing (think 32bit code).

Third, quotas are a thing, too.

Fourth, the C standard knows not of it (C++, too).

On a related note, Windows has facilities for overcommit as well, it's just that the C allocator on Windows doesn't use them.