There are way too many hours being wasted in making themes for blogs. And then comes a new blog framework, it requires new themes. Old themes can't be used because they relied on different ways of rendering the website. Everything is a mess.
Classless was an attempt at solving it. It probably didn't work because I wasn't the best person to make themes and showcase the thing.
Basically everybody would agree on a simple HTML template that could fit blogs and simple websites very easily. Then other people would make pure-CSS themes expecting that template to be in place.
No classes were needed, only a fixed structure of header. main, article etc.
With flexbox and grid CSS was enough to make this happen.
The templates that were available were all ported by me from other templates I saw on the web, and there was a simple one I created for my old website.