Companies have touted open desk workspaces as some grand collaborative masterpiece for years now. It's a very big difference to advocate working from home because you also have to acknowledge that was a total farce.
The trigger event was the forced experiment. Studies convinced me, but I don't have to take responsibility for the health of a whole company so it's easier for me to advocate for risks. Seeing how your company actually behaves in a 100% WFH world is better evidence than a study.
The evidence already existed that WFH is, generally, better. See Stanford's Bloom 2013.
But executives are afraid to take big risks like that. They doubt studies. They overindex on personal experience. Which this gave them.
Now that they see what WFH actually produces, their worldview shifts to what was already true. You get talent that's more productive. Lower costs so you can afford more talent, or, alternatively, more expensive talent. Fewer geographic restrictions so you can recruit a bigger pool of talent.
Once you're convinced WFH works, these advantages can give competition an edge. An executive doesn't want to be on the wrong side of that edge.
But they have to see it first.
There's no reason they go back to thinking F2F is better, unless it actually is, and currently no evidence suggests that is true.
c19 has given people an experience of "almost everyone WFH and the company didn't end".
"There's no reason they go back to thinking F2F is better, unless it actually is". It IS better for some people individually - we see it here on HN in comments from people who prefer to be able to go to an office. There isn't a "one size fits all" approach.
To the extent that we see more WFH across the board, I think it'll be driven far more by "get rid of the office expense" - hard $ savings - vs "everyone's more productive!". They'll be "productive enough", relative to the cost savings of less (or no) office space.
Just my 2c, obviously.
But now that the industry is on the other side of that barrier, it seems to have no reason to go back.
-- Companies have gone virtual, they exist in slack, basecamp-type tools etc. In the 2000s it would sound unthinkable to put your corporate secrets in someone else's server. Today it's commonplace
-- Employees have gone virtual. Their CVs are in github, and the flaky silicon valley market has made them conscious of their personal image / website. They prefer a supermarket of opportunities rather than a long-term relationship
These things oiled up the gears for the transition, and covid gave it a big push.
For big companies it's harder to work fully remote. There are too many people and teams and dependencies. Twitter is not small but also not big.
As for why now? I believe it's simply because now that peons have had a taste of WFH and all its benefits (and realized everything you enumerated), it will become one of the most desired "benefit" in a job. It was a massive leap forward from WFH being a "nice to have" to a "must have" to even be considered by a lot of candidates.
-- Reduction of commute, which is good for the environment and good for people's stress levels.
-- Reduction/elimination of the cost of office space
-- Ability to recruit across a wider geographic area
-- Greater employee satisfaction as people can live where they choose
And so on and so on. And yet in the face of this information, plus studies that show higher rates of productivity when employees / workers control their work environment (and schedule), companies have been resistant. I can speculate on the reasons for this (read: control, stuck in industrial era management practices, etc), but the question remains: why do we think companies will suddenly become enlightened and embrace this long-term?