> Typing nimble install blah is not hard. Those libraries can be as > multiplatform as the stdlib.
In my opinion the main advantage of having a GUI toolkit in the standard library isn't that it's easy to install (although that's a big plus), but that there is a _default_. > Python's "standard GUI library" is Tkinter (marked as "Full" in your image), > but it's used less frequently than Python's (multiple) bindings for qt, gtk, > wx, kivy, etc. Making this decision early on was a mistake. At the time when Python chose Tk as the default GUI toolkit, it was a reasonable choice. Of course you can - in hindsight - say it was a mistake. But you can't predict the future, so there's always a risk involved with anything. If we won't have a default GUI toolkit for some time, maybe people will later say it was a mistake not to include it. ;-)
