Please be conservative with adding methods to Path.

FWIW, my own experiences with pathlib have shown that utility methods have the disadvantage of duplicating well-established Python idioms.  This reduces code readability in my opinion.  While it is desirable that the rather inconvenient os.path may be superseded by pathlib in the long run,  utility methods like Path.glob, Path.open, Path.mkdir, and Path.readtext have convenient stdlib counterparts with long tradition, and using the methods seems disruptive and confusing to me.

This is a further argument for having a path protocol instead IMO.