The company I work for has a commercial lease that is up for renewal in December, and (AFAIK) they have zero intention of renewing it. So that's one data point in the "no" column.
The FAANGs have spent millions of dollars building or leasing their current offices, it's not hard to see the Finance/Accounting folks escalating that those investments should to be utilized. (Not saying that it's a primary driver here - but surely it's a factor.)
If Elon thinks great products can be shipped only from the office, it's fine. We continue to ship "subpar" stuff from wherever. Our products are still useful to a lot of people, get the job done and is profitable and making lots of money.
Modern tech and knowledge work seems like it would happen in a hybrid of office and home (or wherever).
A third data point: Every other office our company has is now open, and employees have to (or are strongly encouraged to cough cough) return.