As somebody who grew up in Europe and moved to the US for a postdoc and then started working in tech and never left, the main difference is the lack of venture

As somebody who grew up in Europe and moved to the US for a postdoc and then started working in tech and never left, the main difference is the lack of venture capital ecosystem in Europe. Why there is no VC ecosystem is a topic for another day. You can have a brilliant idea, but with debt financing, start-ups are not an inviting business for banks, whether the founders have the "right" credentials or not.