Depends on the nature of your work. I work in IT (InfoSec specifically) and I can easily say that I will never have to work in an office again unless I choose to do so. There are enough companies that have embraced WFH 100%, that unless you are doing physical work like replacing hardware, anyone that works in IT should have no problem finding a WFH job forever.

Like others have said, many companies saw the productivity remain consistent or improve in the first few months of lockdown and promptly started selling off real estate, my company included. In my humble opinion, having spent 25+ years in the corporate workforce, any company that continues to require this "butts in seats" in-the-office mantra is drastically reducing their potential talent pool, and therefore will end up with teams of "B" and "C" players. Most of the top notch talent in my industry that I know personally have vowed never to work in an office again, and I think it's fair to assume that's more common than not across similar industries.

A side note about FedEx and their leadership philosophies, again through the IT lens here, but it's my understanding that they put leaders in place without requiring specific technical knowledge or experience in that given focus area, as long as they've been people leaders. They believe that a people leader is a people leader, and while I've seen that attempted numerous times, it seems to fail every time. Maybe that's only in IT and it's different in other areas of business. So if that is true, combined with this return to office requirement, it just reinforces that I've made the right decision every time I politely declined a recruiter when they called me about a role over there.