As far as I know, we haven't seen widescale pull out of Europeans from American Tech companies, alot of talk but not a ton of action. Also, email is so centralized at this point between 365 and GMail, they probably figure there is nowhere to go.

Also, Europe does seem cautious about poking this tiger since Tech is critical industry and it's possible that Europe going "WE ARE DONE!" could prompt massive backlash in tariffs and such.