I've found it funny how many people still believe that most places in the US don't take Discover. I almost exclusively use my Discover card and the number of times I've had it declined is a tiny fraction of a percent. Most people also don't seem to realize that Discover is also a bank, so you can use it for both credit and checking/savings. So yeah, you likely don't have to be forced to use the duopoly of Visa and Mastercard. The only time I've recently used one of my Visa cards was when I visited Europe where I found much more places don't accept Discover, although there were still many that did.

Hopefully the acquisition of Discover by Capital One results in lower processing fees so the network broadens globally and makes the notion that Discover isn't viable a thing of the past.

Amex is regularly rejected by businesses and cannot be your only credit card, so really you maybe have Discover.

I also wouldn’t say either of those is particularly better than Visa/Mastercard. They all engage in the same practices more or less

Why is this downvoted? While slightly sarcastic, you make a good point.

Is it possible to get a UnionPay (China) or JCB (Japan) credit card issued by a European bank? That would be very interesting. I assume in the last 10 years, there is way more acceptance of UnionPay in Europe. UnionPay is widely accepted all over East and South East Asia these days because there are so many Chinese tourists.