I am not a Google employee so I don't know the details. As far as I'm aware they never said "you're fully remote now don't worry about coming back to the office" and now are reneging. If they said that and are reneging then I guess I understand the frustration a lot more and agree people have grounds to feel slighted. Still I think the best recourse is a direct conversation with your manager rather than trying to convince everyone on HN that fully-remote is the only reasonable stance one can take in the software engineering field (royal you, here, not specifically directed at you).

Certainly fair. I'm in the same boat. Looking from the outside. I was at another large company that was a lot heavier on the messaging, and it definitely feels like a reneg.