About 6 years ago, the company [0] that owns most of the local newspapers in my state did a "mobile first" redesign of their website ... which actually was a "mobile ONLY" redesign.
It was so, so bad it was almost totally unusable on anything larger than a tablet. It made it virtually impossible to read articles on a desktop because everything was so spread out, the font sizes were all messed up, navigation was hidden in a tiny little hamburger at the far upper right of the screen, and a bunch of other problems. But what was wild was how easy it was to fix them. I ended up writing a small (maybe 100 line) CSS user style that fixed almost all of the problems.
They did eventually "fix" the site so that it wasn't as bad on desktop.
It was so, so bad it was almost totally unusable on anything larger than a tablet. It made it virtually impossible to read articles on a desktop because everything was so spread out, the font sizes were all messed up, navigation was hidden in a tiny little hamburger at the far upper right of the screen, and a bunch of other problems. But what was wild was how easy it was to fix them. I ended up writing a small (maybe 100 line) CSS user style that fixed almost all of the problems.
They did eventually "fix" the site so that it wasn't as bad on desktop.
[0] https://www.al.com/