We have different definitions of lightweight it seems like.
Well, μ- is a million times bigger than p-. But last time I looked <https://news.ycombinator.com/item?id=45163827>, Pico CSS was 83 kB—nowhere near as small as that name would suggest, either.
When I worked at the BBC in the late 90s / early 2000s the home page of any site - including images - couldn't be more than 70kb!
Just checked - now the homepage of the BBC on load has a transfer of 1.5MB with 5.7MB of resources, and once you've scrolled down the page for the lazy loaded images those figures are 2.9MB and 7.2MB respectively.