I don't feel fortunate, but I've never had issues with the online system for Walmart or best buy.
I've fukked up before and missed a drop, like oh shyt it's dropping at midnight I need to be on at 11pm and tried at 11:27 and they were gone.
I remember when best buy didn't make you sign in with an account before drops, and I remember when Walmart had special drops for Walmart + members.
I've gotten ps5, Xbx, xbs, and switch 2. Once it says your in line, your good. At least in my experience. I've read online people saying "I was in line for 40 minutes just to tell me they sold out!" Maybe at a

retailer.