Get rid of all the backwards compatibility shit, and actually create strict, and simple standards, with no unexpected behaviour, that only parse valid documents, and where anyone can write an implementation?
Because that’s the definition of a standard.
That’s what a standard is supposed to be.
Standards, from paper standards to screws to fucking cucumber regulations are supposed to be more strict than what came before them, so anyone can easily accept only one type, and know it will work.
The WHATWG "standards" don’t fulfil the definition of standard in the least.
They are a strict superset of everything all implementers accept, making it a larger and more complicated mess with every single iteration.
So when will the WHATWG, as you say it’s now the legitimate standards body, do what it, as standards body is supposed to do, and deprecate currently used behaviour to replace it with stricter, simpler, standard behaviour?
Yes, that will break the web, but yes, it will also improve it.