Yes, CSS layouting no longer sucks. But there are still endless foot guns which will cause a completely independent page of yours to change unexpectedly/fail to

Yes, CSS layouting no longer sucks. But there are still endless foot guns which will cause a completely independent page of yours to change unexpectedly/fail to render correctly, and you won’t catch that for a long time. CSS is like global mutable state — it is too flexible to properly work when multiple people work together on it. Sure, I’m never against learning something from fundamentals, but I am on the opinion that it is increasingly the wrong default.