Have you worked in an open office or cubical farm? My hearing the sales guys isn't 'collaboration', it's distraction. Hearing my coworkers at the much-lauded ping pong table having a great time while I'm trying to get work done isn't collaboration either. Collaboration is often code for 'meetings'. As evidenced by my outlook calendar, those haven't stopped. I find that people who make this argument are those who either spend the majority of their day 'collaborating' or those who have offices they can escape to when they need to think.
> One data point is the BLS released quarterly productivity numbers last month. Productivity is down 4.1% [0]. That's pretty massive.
Mass WFH started in 2020 - I don't think you can link a Q2 2022 productivity decrease to WFH, considering the previous quarter will have had even more WFH. In fact, it's easier to link it to the return to the office.
Edit: Hell, we can even see that non-farm business sector productivity INCREASED in both 2020 and 2021.