Agree, but I'm not promoting Bitcoin, I think it's poorly designed by someone who doesn't understand the properties of good money. Another crytpo with better properties will supersede it. It's the idea of crypto that's great, not the particular implementation of that idea called Bitcoin.

Once you know an trust a vendor, paying with cash will eventually be a few percent cheaper just as it often is as brick and mortar places sometimes when they offer cash discounts because they too don't like the fees the cards companies force on them.

It's not an either or scenario, it's a both scenario; you should have the option of cash or credit online, just like you do in the real world.