C++ profiles: a chance to fix some annoying defaults? Brainstorming and ideas.

Hello everyone,

Lately I have been thinking about the opportunity that profiles could give to C++ for "better defaults" and "cleanups".

Which profiles would you like to see in an eventually profile-enforced version as "standard" or "enabled by default" that you think can be fit reasonably?

I will start:

- ununitialized variables: must use [indeterminate]
- [nodiscard] by default? Would that be possible? Maybe this changes the meaning.
- hardened std lib guarantee?
- type safety/bounds safety (in user code)





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