No idea of the business your in but remote work is not working for many sales people or client services and many others that need to deal with external customers.
If those who keep the sales and contracts coming in want offices then ceo's will ensure they get them.
Offices will become smaller and more regional but they will exist.
Over the years via osmosis I have learnt so much by overhearing colleagues talking. I met people I would not normally as not quite my line of business or typically we are both just cc'ed in emails. These have become contacts, friends, allies and others simply provided opportunities or put in a good word for me.
I can choose where I work and have pre Covid era worked a lot at home due to projects I had on. But was planing a lot more time in the office this year as I knew I needed to ensure I mixed more.
Chatting with very senior managers, directors and ceo's simply won't happen if remote. But does when your both some of the only people in a quiet satellite office.
No need to brown nose but being more than a name on a chart helps.
Everyone is working very effectively at the moment as in most places there is with lockdown little else distraction wise and many focused on ensuring they stay employed.
In fact for many employees I think the moment they don't have to take a video con call which runs on as the client knows they have no commute and little else to do. Many people will be happy.
Some companies and departments will go remote and thrive in the long-term and others will once things settle find they need many staff back in an office.