We were already starting to move people off-site to save money/make more money (we lease out our buildings/floors, so less space for company people, more profits from leases) so we had a leg up when all this happened, as the infrastructure was there. Saved our rear really, we were over-built on infrastructure.
For me, my job doesn't change. I never saw my manager but once or twice a week regardless, and I was left to my own devices. The only downside is that HR/Finance is micromanaging every minute, and for IT that is a nightmare.