>Succinctly, remote work enables arbitrage from US wages to EU cost of living.In theory yes, in practice it doesn't look like it's happening. I haven't seen a massive boom of US companies opening up shop in my EU neighborhood.
Those who wanted to hire EU workers have been doing it already. Plus, why would San-Fran companies move to Europe when haven't even exhausted all lower cost areas in the US yet?
Operating in Europe and hiring here opens up a lot of headaches and liabilities, other than culture and time zone differences, that many US businesses don't like (sick leave, parental leave, taxes, labor laws, more taxes, etc). It's not as easy to hire here remotely as you think.
You need to have an legal entity in each EU country if you want to hire in every country, or, the usual M.O., you open a shop in Dublin, Berlin or Amsterdam and hope people from other countries can stomach the housing market and accept to move there, but unlike the US, you can't remotely employee people in an EU country while they live in other EU countries as labor laws, tax and social systems don't easily allow cross-border remote work as every country expects you live and work locally or use the cross border commuter policies but for that you need to live near the border anyway.