Prior to "the event" I used to work from home 50% of the time anyway, with the rest split between travel in the EU and sometimes India, and at the company offices in the US. So I had no permanent "office" as such.
I'm just starting to travel again in the EU - and my God it's a logistical nightmare, what would have been a quick 3 day trip in 2019 is now something closer to a 8-9 day odyssey with all the associated testing, waiting, then travel, work, then testing again, waiting again, then travelling home, and even then it's 8 days of quarantine, with a further 2 tests.
I anticipate that later in the year the department will expect to see me at the US offices too, when travel between our countries is allowed. So it's on the way to becoming like it was before, although more complicated now.
The company is starting to invite its usual / local people back in to the US head office. Apparently there's no hard expectation that everyone will be in at once, but there's a strong hint that people wishing to work from home more than a couple of days a week will need a strong justification and a long discussion with their manager. But I think there will be a mix of WFH and office work for them in future.