The reason I like AmEx is that they are much more customer friendly. But the things they do to be customer friendly also makes them less liked by companies.
I’ve been a CostCo member since at least 2006. I really liked the fact that they gave me an AmEx, but I didn’t really use it for anything other than CostCo.
About a year later, I discovered that you could use any major credit card to debit card to pay for your goods at CostCo, so long as you identified yourself with your CostCo branded card. I stopped using the CostCo branded card soon thereafter.
After they switched to Visa, I stopped going to CostCo pretty much entirely.
It wasn’t until the pandemic started that I went back to CostCo on a couple of occasions to buy some things that were not available elsewhere.
I’ve got enough Visa and MasterCards. I don’t need any more.