it might seem like a minor issue. if I really wanted to shop with Walmart I could try a different browser, try their app, or switch to my PC. but people don't do that when they just want to buy something. approximately no one cares about giving second chances to a megacorp.

when you have strong competition, it's not enough to mostly get things right at a high level. the little things matter just as much for earning trust. Amazon gets this. Walmart, apparently, does not. they're a solid second choice if something is sold out elsewhere, I'll give them that.