Using tables for layout is pretty understandable. But when tables went out of fashion it was all about using floats for layout for a few years. That was wild, I am surprised it was left out from that list. https://developer.mozilla.org/en-US/docs/Learn/CSS/CSS_layou... "Originally for floating images inside blocks of text, the float property became one of the most commonly used tools for creating multiple column layo…
Speaking of floats being used for layout, you could probably add the clearfix hack to this list too. That was an essential part of my CSS toolbox for years, and something that ended up being one of the first things added in every new project. https://css-tricks.com/snippets/css/clear-fix/
Fell out of use because "nobody uses IE for Mac" :)