>Even if that made sense, or some of these tech giants simply decided to cut their losses and say good buy to the Euro sector
I think it would be short-sighted decision. Currently European tech scene isn't great, because it is hard to compete with US companies awash of VC money or who are highly profitable and entrenched in the EU market. But if those giants would voluntarily clear positions, competition would have arise and could threaten the giants in the long run - i.e. by offering privacy thanks to coming from EU, where GDPR non-compliance is very expensive.
This is similar situation to why USA has such huge military presence in Europe in general. Sure it is expensive and Europeans are sometimes ungrateful, but if they would have left, then in the long run EU would likely got its own unified army and become serious geopolitical competitor on level of China, even if ideologically aligned with USA.
I think it would be short-sighted decision. Currently European tech scene isn't great, because it is hard to compete with US companies awash of VC money or who are highly profitable and entrenched in the EU market. But if those giants would voluntarily clear positions, competition would have arise and could threaten the giants in the long run - i.e. by offering privacy thanks to coming from EU, where GDPR non-compliance is very expensive.
This is similar situation to why USA has such huge military presence in Europe in general. Sure it is expensive and Europeans are sometimes ungrateful, but if they would have left, then in the long run EU would likely got its own unified army and become serious geopolitical competitor on level of China, even if ideologically aligned with USA.