"" This is especially true because to agree on things, some toolkit is going to have to change what it does, which is probably going to break existing setups. ""
lol.. setups that the "end users" end up breaking anyway with every new release of an environment, importing themes of every kind right and left, sometimes quite unstable, and applying configs that none developer thought off or tested ( hey! why doesn't this or that appear!?.. lol)...
for a common *basic* theming it would only happen once, then everybody should be free to evolve around that as they like... and then business as usual, every new release and the user changes completely the look from the default lol... boy! that must piss terribly the developers lol</sarcasm>...