[colejohnson66]

The problem is browser vendors wouldn't want to implement that spec because if updating your browser breaks the website, no matter how much you explain it to the user, it's your fault, not the website owner's. It's why we have Quirks Mode even after 15 years. It's why Linus is so adamant about patches breaking userspace;[1] if your update broke it, it's your fault, no matter how bad the truly broken thing is.

[1]: https://lkml.org/lkml/2012/12/23/75

[AnthonyMouse]

There are cases where the status quo is already broken and you're already being blamed for it. A change that makes the brokenness 20% instead of 80% by inverting the set of weird websites it happens on is going to make userspace less broken on net.