Let me rephrase my question since we got on the wrong foot here.
Was there any effort to make HTML5 overrides for Joomla so that only absolutely necessary HTML is outputed to present all Joomla features.
There are additional
DIVs which only purpose is to provide semantic attributes while same thing can be achieved by using HTML5 specified tags with much less markup.
Also, one other thing. Most of default module chrome options don't support all possible module settings like custom title tag (h3 is hard coded), bootstrap column span option etc...
I had to make my own chrome overrides to enable all this settings. It seems like a waste to not use all of the settings available in the administration.
There is a lot of bit's and pieces that stand with no purpose at all (especially in the stock modules), and I can't collect them all in this question.
So, is there some kind of Joomla HTML5 boilerplate that keeps markup absolutely minimal and clean?
It's much easier to add what you need than to go through all the messy code and removing unnecessary markup that sometimes spans through several