(A fun trivia fact is that like 7-11, Lawson also originally started in the USA. They only recently-ish returned stateside with locations in Hawaii (IIRC).)
My only real point was that they are categorically above their US counterparts, and that it's not just a Japan-specific thing.
In much of Asia (JP, SK, and TW excluded), convenience stores like 7-11 are similar luxury wise to what Target is in the US.
The joke was the ATM at every 7-11 with the line of foreigners every Friday night. ;P
A good NYC bodega is as stacked as a 7-11 in Tokyo. Really good fresh baked goods and they'll cook up anything you want for you too.
My guess is that the lack of foot traffic changes the clientele in the states.
No. And it isn't as clean, orderly and organized either.