Meanwhile, if you don't have a platform like that to build off you are severely constrained in many other markets. Look at elastic - this is the kind of business that will dry up in the next 5-7 years. It's structurally unable to compete without being part of a major web services platform.
It used to be that building a car company didn't require a huge amount of capital, either. Detroit had hundreds of small automotive businesses before consolidation under the big 3 took place. We are witnessing the same process take place in tech.
But then ... what technology was really advanced by companies like Facebook? Except the ad-surveillance-machine and stuff you only need if you run a multi-billion-people "social" network ... the only thing they innovate in is business models that hurt society.
The US does have some major advantages, marketing, flag waving, cultural supremacy (which feeds into marketing), and the ability to create and exploit rent seeking at a global scale.
It benefits the companies and the share holders, but doesn’t neccersarilly benefit the American worker. Nobody care that Nike and Addidas are used globally when the employees are in Bangladesh on 10 cents an hour.
And, that software is maturing.
In much the same way Japanese automobiles didn't compete with US in the 60s by having a plethora of automobile startups started in peoples' garages. It was done with large companies copying American tech being plowed with lavish subsidies and a protected domestic market.
Europe will likewise not compete with American tech head on with small tech startups either. That ship hasn't quite sailed yet, but I don't think it's far off.
I hope I'm wrong.