That may all be true.

However it seems odd to not follow your ending paragraph with more circumspection re the earlier ones.

If we stipulate that the USA is ending a trend of relative reliability and stability and as such constitutes more of a risk to Europe - including invasion of Greenland - why would we assume from this a stability in European regulatory regimes?

You don't think changes in the United States portend changes on the European continent? Do you imagine the USA descends into apocalypse while Europe remains unchanged? Will the incentives that push the American government to threaten "digital sovereignty" not loom in a Europe that has to increasingly face a more dangerous (given your own premises) world alone?

Yes, the current American administration is a disgrace. That is quite obvious and no achievement to point out, as you seem to well know. Don't let that automatically lead to the conclusion that Europe is some sanctuary. That does not logically follow. A relative improvement in conditions may end up being temporary. Caution is warranted. Especially from Americans who follow this "move my infra to Europe" trend without knowing Europe or its conditions with any intimacy.

As I said it's a good idea in principle. But some skepticism and caution is warranted.