Well, my point is that there's unique pressure for browsers to be permissive for practical reasons beyond Postel's law even if you were building a browser in 2025 and the whole internet reset to xhtml.

And that's because the end-user is at the mercy of, but not party to, an over the air interface between the producer and consumer that you can't verify ahead of time.

So if you're consuming a stream of supposed xhtml `<p>foo<p>bar</p>`, you have to decide if you want to screw the user for the producer's mistake for a single fuck up in the website's footer.