I work in the Miami office of a global NYC-based law firm. I work mostly with colleagues in the NYC office and very few of my clients are even in Florida, so even before this hit, the Miami office was mostly a "remote" location from my perspective and I worked from home at least one day a week. In the pre-Covid era, I used to work out of WeWork spaces in Toronto when visiting family there and no one at the firm knew the difference. Frankly, many of the "culture" things that people point to in the centralized physical office (e.g. colleagues popping in to chat or socialize) are fine in moderation but on a full-time basis distract me from getting deep work done.
I think having a shared space that folks can get into, as needed, to collaborate, establish a routine, or get away from home-distractions will remain important post-Covid, but this has definitely been a light-bulb experience to many senior partners who previously swore by the face-time model.