I found https://tkdocs.com/tutorial/idle.html and it mentions the improvements should make it into Python upstream. Did all of them already made it?
Another question is whether most of the UI-related content (e.g. from files ui.py uifactory.py uifind.py uipreferences.py uitabs.py) could be made the default for all tkinter Python apps (i.e. make it into the Python upstream tkinter library)?
Because defaults is the only thing which matters (nobody wants to spend tens (or hundreds?) of hours only to look for all the hundreds of tweaks to make a UI look acceptable).