Reminds me of when I discovered that Google Inbox worked in Firefox, even though Google decided to only allow Chrome to access it:
https://news.ycombinator.com/item?id=8606879 - "Why Is Google Blocking Inbox on Firefox?" - 213 points | Nov 14, 2014 | 208 comments
(correct link to the gist is https://gist.github.com/victorb/1d0f4ee6dc5ec0d6646e today)
I think that "ongoing" push you're talking about was/is accidental, because a lot of people use Chrome. What I'm seeing now seems to be intentional, because people disagree with the ethics/morals surrounding AI, or seeing a large impact on their servers because of resource consumption, so more philosophical and/or practical, rather than accidental.
But who knows, I won't claim to have exact insights into exactly what caused "Chrome is the new IE", could be it was very intentional and they never stopped.