It's worse than that, sadly. A lot of what is perceived as standards (that is they have an official sounding spec on w3c somewhere) are actually not, and are just Chrome releasing stuff.
If you go to MDN and click on multiple experimental APIs you'll find they do have a spec. And they are shipped in Chrome. And then you start reading the spec and it says "It is not a W3C Standard nor is it on the W3C Standards Track.": https://developer.mozilla.org/en-US/docs/Web/API
The reason for my comment is that far too often these complaints are about some things that Chrome ships at neck-breaking speed.