>There is: flexbox and grid. All kinds of alignment can be done with basically a one-liner in both layout systems, without any hacks.

You missed the part with "there should be ONLY 1 way". I know about flex and grid, this are new and thanks the gods we finally we have something decent (not good).

Flexbox is great I wish to magically remove or magically fix all the code that does not use it and instead uses "float" or other shit.

You would say "don't use the other old shit" but my point was that we need a GUI framework that does not have 1 million lines of code for supporting this old stuff. If we really want to use HTMl a language for documents to write GUIs then we should make a new version that is the modern subset of html and css, where you ONLy have 1 way to do a thing (remove or limit the use of float, don't support all boxing models, simplify the layout rules so I don't have to google and find that to make something to work I have to set min=width=0 so the css engine follows a different path and does the correct thing)

I'm curious if you've found any GUI frameworks for any OS, in any language, that have ripped out all their legacy code and/or the design tradeoffs and hacks their legacy code required.

>I'm curious if you've found any GUI frameworks for any OS, in any language, that have ripped out all their legacy code and/or the design tradeoffs and hacks their legacy code required.

Yes, Qt4 is not compatible with Qt3 , Adobe Flex4 was not compatible with Flex3 , I only used at that time this new versions and did not had to work or learn the old stuff. Old projects continued to use the old stuff and continued to work.