That’s not entirely accurate. Google’s influence on the web has grown even beyond the web browser engine majority share (which is bad enough in itself). They offer one of the most popular web frameworks and run several of the most popular websites. There is almost no way to compete when the market leader is simultaneously the developer and the major user of new features. Of course everyone else is going to switch to using your browser engine. What else are they gonna do? There are even websites now that just check the user agent string and refuse service if you don’t use a chromium based browser. Shit’s fucked.
XML aims to be both human-readable and machine-readable, but manages neither. It’s only really worth it if you actually need the complexity or extensibility, otherwise it’s just a major pain to map XML structures to any sensible type representation. I’ve been forced to work with some of the protocols that people like to present as examples of good XML usage and I hate every single one of them.
Fuck YAML though. That spec is longer and more complex than any other markup language I know of and it doesn’t have a single fully compliant implementation.