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Old CSS, new CSS (2020)
I first got into web design/development in the late 90s, and only as I type this sentence do I realize how long ago that was. And boy, it was horrendous.
Early browsers didn’t handle this correctly, and some otherwise strict-mode websites from circa 2000 rely on it — e.g., by cutting up a large image and arranging the chunks in table cells, expecting them to display flush against each other — hence the intermediate mode to keep them limping along. And the more conscientious authors noticed that screenreaders would read the entire sidebar before getting to the body text, which is a pretty rude thing to subject blind visitors to, so they came up with yet more elaborate setups to have a three-column layout with the middle column appearing first in the HTML. Case in point: someone (I dug the original source up once but can’t find it now) had the bone-headed idea of always setting body { font-size: 62.5% } due to a combination of “relative units are good” and wanting to override the seemingly massive default browser font size of 16px (which, it turns out, is correct) and dealing with IE bugs.
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