Earlier quoted context omitted.
Not much to be happy about here. The "Living standard" ensures that independent browser implementation from scratch is impossible. Even not from scratch, see MS Edge.
Impossible? Tell that to Flow: https://www.quirksmode.org/blog/archives/2020/01/new_browser...
> Well, it can render and interact with Gmail quite well. It’s pretty much perfect on a few sites we’ve targeted as focuses during development, but it struggles with many others.