It will already take a while for companies to absorb the change of distributed organization in the US. Opening to the world brings yet another set of challenges: taxes, employment regulations in each country, timezone differences, cultural differences, etc.
I know FANG are really good at propaganda, but I don't see them going overnight from "good work can only be done with everyone in the office" to "well sure, one guy in SF, one in London, and a third in Sydney", no big deal, just jump on the zoom" without looking completely ridiculous.
If the direction is to go full / mostly remote, I believe most companies will insist on ensure that working hours mostly overlap with US business hours. So I think the big winner here will mostly be tech workers based in South America.
At my previous job at a SF based ad-tech company, I was the lone SF based engineer. Boss was in Australia, rest of the engineering team was in South america.
I know FANG are really good at propaganda, but I don't see them going overnight from "good work can only be done with everyone in the office" to "well sure, one guy in SF, one in London, and a third in Sydney", no big deal, just jump on the zoom" without looking completely ridiculous.