The SE has a minimum capital requirement of 120k € so is not within reach for most people. I think this EU-Inc would be a simple structure with a lower threshold.

I am absolutely for it. There are too many different types of company structures in the individual EU countries and they don’t work well when you move and come with all sorts of different risks. Obviously many are also just cumbersome to start and dissolve. You could start five US LLCs within ten minutes of filling out some online forms whereas to start one European entity depending on the country you might have to make a notary appointment, register with the national registry and the tax authority. I think there’s a lot of room for improvement which can take days to weeks.