I was thinking the same. IT is a huge business, the best kind of business right now, the pinnacle of human technology at this point in time. America is the world leader in development, and "exports" of IT. You can't really tariff software, as it's some kind of IP.

On the other hand, much of the "digital infrastructure" is free and open. Perhaps if rival powers put enough effort into sanctioning US effective sales in IT, however that may work, America could lose it all.

EU has a surplus on physical goods, and a deficit on services.

With regards to goods, the EU exports more than it imports from the US, but we do import more services from the US, which can likely be taxed in retaliation.