The (large) company that I work for was actively starting to do away with WFH just as this whole Coronavirus thing happened. Obviously they've had to put a halt to that.
The reasons that management gave generally revolved around what they term, "Agile Collaboration". They feel that more work will get done if everyone is sitting at the same table in the same room. Their vision is to have people "hotel" by working from whatever seat happens to be available in a large room on any given day. Nobody would be allowed to have a dedicated space that's "theirs".
Seems that most (but not all) of the IT people that work here disagree with management on this. Reasons generally mentioned are office noise, workplace distractions, time lost to commuting that would otherwise be productive, and of course the recent health concerns. In the cases of many teams (such as mine) we have people all over the world, and making individuals sit in an on-prem "hotel space" isn't going to increase collaboration at all.