Of course they’re implemented properly in Chrome. They wrote those standards, and pushed them through without review. Hence why technologies like WebRTC and simple gradients had about 8 half-working implementations in Chrome, while the later IE team put a hand up and said “Hang on, let’s implement this the right way and agree on a spec.”

The way you describe IE-specific hacks was true up through around IE9. Once they got to Edge, they retired importance of major versions and insisted people auto-update their browser, getting companies off the idea of retaining an old browser for “compatibility”.

They were doing the right thing for a short time before the end. I suppose a lot of people didn’t even see that period.