Off-shoring, near-shoring. Where some of your colleagues are permanently virtual-only.
Cross-company collaboration. Specifically a lot of work involving dealing with external parties like vendors. Due to companies outsourcing many of their processes and systems.
Family situations becoming more complicated when couples both work, thus many work schedules no longer being a simple 5x8.
Commoditization of digital collaboration: email, chat, teams/zoom calls.
The rise of multi-tasking: many people are pulled in 20 directions.
When you add up all these effects, a return to the office is not a return to glory. I loved the way I worked 20 years ago: small group of people, local only, focused work, deep relations with co-workers, fun, spontaneous ideation, etc.
When I "return to the office" now, I see people with headsets in calls. Roughly 4-6 hours per day, and then there is messaging and email still. Working together barely seems to happen for the simple reason that actual work seems to barely happen. It's just calls and chat now. A productivity pandemic and I'm shocked how leaders do not intervene at all.
Maybe they can't. Maybe our world and work has simply become too complex.