There are plenty of European customs and views that make developing these companies unpopular (eg data collection and privacy) but the single-massive-market is the economic reason why the US is so powerful.
There are plenty of European customs and views that make developing these companies unpopular (eg data collection and privacy) but the single-massive-market is the economic reason why the US is so powerful.
To even have a shot at getting a successful startup off the ground, you need to a assemble a whole team of those people, which is still much more difficult in Europe (though things may be starting to change).
The VC system and network grew out of this existing development in America (of course the capital markets have been there since before tech, as I mentioned). The banking and finance system grew in America for the same reason - a large single-regulator market.
Spotify is basically a US company today - They have huge US offices, and their US subscribers are crucial. It's also a perfect example of a business that doesn't follow the high-fixed-cost-low-ongoing-cost model. They have to pay a license fee for every stream, so they can't amortize their costs across users nearly as well.
SAP is another example of a business that doesn't amortize as well across users - their product is very bespoke per company, and negotiated individually.