I think a challenge to this evolution path is the same as what motivated Sutter’s cpp2: defaults

I think the premise that a lot of experienced programmers can write good C++ is at least somewhat valid. They know to not use raw pointers, which APIs to use for bound checking, whatever. The issue is that new users don’t, and the defaults are bad.

If I have to write #feature on safety in every file, it becomes possible to forget. Opting in vs opting out