There is a concern that one can have too many tools to do the same -- or very similar -- things. This can reduce readability. Consider Perl's many ways approach to Python's (initial) goal of one way.
Every new release of Python 3.x further erodes this idea. I like using the new features because I find Python generally inexpressive and verbose, but I have a hard time explaining to nondevelopers who read the code about the assignment expression, keyword only arguments, structural pattern matching, typing improvements and deprecations and so on.
