SF where a huge amount of the residents have left the city since a majority of the white collar employees are WFH for the foreseeable future.
Not sure how you can take these places and extrapolate for the economic health of the entire country...
Certainly not. I don't think it's bad either, but some people (owners of expensive offices) do.
https://www.bbc.co.uk/news/business-53925917 -- Warnings of 'ghost towns' if staff do not return to the office
As to shareholders of chain coffee/lunch stores -- https://www.bbc.co.uk/news/business-53939526
Of course, but it has a significant, fundamental impact on huge aspects of "the economy" as we know it. Large segments of commerce - particularly in the U.S. - pivot heavily on people spending time and money commuting, spending time in an office, eating and drinking at nearby establishments, etc.
The effects will take some time to shake out.
Overpriced coffee shops (not Central Perk style ones in neighbourhoods - takeaway chain ones)
Daily Mail (the metro readership will vanish)
The trains will be interesting - especially in London. UK rail infrastructure is built to cope with large numbers of peak time commuters travelling with large discounts. That infrastructure won't vanish, but the income will (a £3k a year discount for a season ticket still means you're paying £4k a year - if that goes, times a million, it's a lot of operating revenue with little drop in costs)