If you have an EU passport, travel is infinitely more easy. You also get customs free access to EU goods with no quantitative limitations.
If you are a business, you get all kinds of access and benefits you would not have if you are not a member, including funding, subidies, and grants.
I ain't the biggest EU fan - I just lived in Europe for several years and that's what I saw.
What a turnaround from 63 years ago, when the devil had the people by the tail in Bulgaria, according to the young woman from Bulgaria in Casablanca.