[Rusky]

If that is what profiles were actually doing, it would probably make sense. But it's not what profiles are doing.

Instead, for example, the lifetime safety profile (https://github.com/isocpp/CppCoreGuidelines/blob/master/docs...) is a Rust-like compile time borrow checker that relies on annotations like [[clang::lifetimebound]], yet they also repeatedly insist that profiles will not require this kind of annotation (see the papers linked from https://www.circle-lang.org/draft-profiles.html#abstract).

Their messaging is just not consistent with the concrete proposals they have described, let alone actually implemented.

[pjmlp]

Additionally they ignore field experience, I can tell that on VC++ the lifetime checker only has worked in small examples, as I was really into trying it out.

Microsoft even has blog posts admitting that only with SAL like annotations it can be improved, while keeping the usual C++ semantics.

Yet WG21 has ignored this field experience.