> Right now the EU, despite being a single market in many respects is far from being a true digital single market

I think this is less about regulations and more about language. Most people in the EU simply don't speak english so you would have to have your marketing and sales in 20 languages which is simply not doable. A french startup just can't cold call a romanian company because they can not communicate. Yes, it gets better with each new generation but it will be decades before this is "solved".