1. Workers (that previously hadn't been remote) realizing that it has good parts and bad parts, that paying an extra 10%+ in rent/mortgage in order to get a proper home office can be the cost of working from home (and then the costs of utilities for a now non-empty home). That doesn't mean it's bad, just that it has pluses and minuses.
2. Companies realizing that people working from home _does_ have benefits, and it's _not_ just people sitting around in their PJs being unproductive.
Then I think we've gained something. It's not a backfire, so much as a better understanding that everything has tradeoffs.