[elemos]

I don’t think this is true. GA has at least 2 versions it doesnt support in the past decade.

I imagine the opposite is true, in that they hold so much power they can do as they please.

[lhorie]

My understanding is they are veeery careful around rolling out changes and deprecations. The cleverness is that there's a huge asymmetry in how fast Firefox can globally deploy updated shims vs how fast Google can change GA API.