The ones I listed as exceptions are basically the only ones you can't dumb down without more effort than it's worth, computers and complex electronics are generally super standardized and can't really be made all that much worse. More or less the same thing with firearms can't be lowered passed a certain point. Though I can assure you that with maybe the sole exception of the game systems Walmart is largely stocking the cheapest versions of the stuff they can't get manufactured cheaper, the only reason the game systems noted as an exception is because they are already the inferior gaming platform.