Zoom and it's relatives and precursors were, in fact, used a lot less. The analysis of the traditional office work flow consisted of people dealing with work flow from manufacturing. (orders/parts/repairs etc) as well as similar work flows from ducument managing companies. (insurance is the leader) and dealings with the assorted levels of government.
Many of these work flows took very well to remote work and this process is now so well established that it will never fall back to the way it was. Similarly conferences leapt in zoom and it's kin. They may never fall back to the way it was. Same with trade shows - online tradeshows flowered - they will not die - too many people found they quite liked the efficiency and cost/time saving of the online mileu.
Sales people will want the zoom/online conferences to die ASAP, as they prospered in the one-on-one pressure sales - think car sales people.
So I feel this blog is - to a degree - wrong. Online will not collapse, it will fall back a bit, but not to where it was.
My direct experince with well done online professional society meetings means I will never fly to a conference (unless no simultaneous conference is also running).
It means little to me to drink and rub shoulders with other attendees - and waste 3-4 days and a few thousand $$ if I can deal with it online.
Conference organisers will exert great pressure to block simultaneous online and convention hall conferences - they lament that gravy train, so a muddle will emerge, and online will win - IMHO