I work in a office where there are some large customer service call centers and most of those call agents are working from home right now while new hires and others that can't work from home are still in the office. One manager told me he can't wait till we finally open up the office to return because over half his team has been significantly less productive at home than they were when they were in the office before the pandemic. These are probably lower paying entry level jobs so I'm sure there is not a lot of motivation to go above and beyond.
Depending on what kind of metrics companies are tracking I think there are scenarios where after the dust settles on the Covid pandemic there are going to be jobs that will need to come back into the office while others will stay at home in order to be the most productive.
He probably won’t be so happy to go back to the office when 30% of the people working remotely quit.