This looks more like an attempt at criticizing the bloat people add to their websites basically just to change the font from Times New Roman. I can't really see this competing with bootstrap, since it lacks all the custom components.
I write web apps which need real frameworks.
I also write basic text pages, and something like this is very nice. It's a dying art (university professors seem like the last hold-outs), but it's often handy.
The top comment gives a list of such frameworks, though, many of which look nicer than this one.