On Friday, April 28, 2023, Dominique Devienne wrote:

Of course, Boost.Compat (or Boost.Polyfill) would need to turn on/off its std:: alternatives depending on the standard level in use.

If everyone agrees, this can be one of the tenets of Boost.Compat from the very beginning. The "depending on the standard level in use" might be further clarified to mean "provides a fully functional std:: version". Glen