People have already made plans for their 4 discretionary weeks of full remote, so no, management cannot renege on the hybrid policy this year. Maybe 2025.
Folks have had their sabbaticals canceled at the last minute. Remote work, where the agreement is that you’re working and not on vacation?
They will move to five day if they don’t see an exodus post bonus and reduction of existing WFH agreements. There’s a magic number they want to eliminate on the cheep.