Right, these are in the "Don't use them in new code, but we have absolutely no plans to actually remove them" documentation-only category of deprecation warning.

However, I'm converting this to a documentation enhancement request, as the documentation could make that status clearer by moving them to a separate "Legacy builtin decorator subclasses" section at the end of https://docs.python.org/3/library/abc.html

Then that section can *start* with the information on simply applying the builtin decorators on top of the abc.abstractproperty() decorator, before moving on to document the available subclasses.