I think a big big reason for that there is no Big tech companies in Europe is really that the landscape is so much more diverse then in the US.
If you are big in one state in the US. You have the same lang and most likely the same regulations. In Europe its so many languages and its no more likely that we choose a company from another country in the EU vs the US.
I think that is not true for the US. So its easier to get big in the US, and then you are so big its actually likely the a company in the EU would choose you. Maybe not over another company from the same country (everything else beeing equal), but over a company from another country in the EU/Europe
If you are big in one state in the US. You have the same lang and most likely the same regulations. In Europe its so many languages and its no more likely that we choose a company from another country in the EU vs the US.
I think that is not true for the US. So its easier to get big in the US, and then you are so big its actually likely the a company in the EU would choose you. Maybe not over another company from the same country (everything else beeing equal), but over a company from another country in the EU/Europe