Jury is out though – for all the people that like the flexibility, you have a ton of people miserable with the lack of community and miserable with the blurring of work/home schedules. Think about those horror stories about Goldman and the other investment banks lately; the cardinal innovation of WFH was basically turning a 60-hour work week into a 90-hour one. That kind of thing is not sustainable or popular long-term. Not to mention that the real estate industry is positively begging its higher-end clients to come home, and a lot of things are at stake economically if they lose out on all their tenants.
Also, for most New Yorkers, owning a car is not a pleasant experience, and if you can commute to work without using it, you choose to. Nobody likes sitting in traffic forever, paying tons for parking, doing the alternate-side dance, etc. It's a serious additional expense for a lot of people, and leaving aside the obvious environmental issue, it's pretty inconvenient as a daily commute. I wouldn't bet on this continuing. Something like the Holland Tunnel traffic of late, for example – nobody in their right mind is going to prefer the two-hour delays we see now as opposed to NJT once things are back in the swing of it.