Perhaps if you need a comprehensive toolkit that supports the various widgets and gestures in contemporary toolkits, it is a big undertaking (probably not that massive, IMO).
It is incomplete and non-comprehensive, but adding the nuances needed to make it more complete and comprehensive wouldn't be too much work (it's simply not our focus in the project).
I was citing the amount of work to create a minimal acceptable toolkit to a programmer on the street, the sort of toolkit you'd point a hostile Python programmer to to say "Yes, we have a native toolkit", not the toolkit that you'd use to convince an already-converted Haskell user. Bear in mind that Tk prior to their relatively recent theme work was not that toolkit either! And that was actually a pretty decent kit, with layout managers, a nice text widget, tabs, all the basic stuff you'd need, if not the fanciest ever.
* It is incomplete and non-comprehensive, but adding the nuances needed to make it more complete and comprehensive wouldn't be too much work*
So it's minimal AND incomplete. Not even minimal and complete. That's what the parent was saying. And it will likely stay that way (as it's not even your focus in the project), and be forgotten.
A minimal toolkit that can do interesting things is a few weeks of work in Haskell. Here's an implementation of one: https://github.com/Peaker/bottle/tree/master/bottlelib/Graph...
It is incomplete and non-comprehensive, but adding the nuances needed to make it more complete and comprehensive wouldn't be too much work (it's simply not our focus in the project).