If it’s anything like superstore in Canada, they need too much babysitting. Even if there is a store specific person able to fix problems to prevent them from happening again, corporate will force push an update that reverts it. Lots of product entries for things not available on that side of the country will return after being removed and all they do is lock up the system because they don’t actually exist. Every little thing requires the human cashier to reset or override something. I ran 8 at a time on my own when they were new but most people couldn’t do that while ensuring nobody notices the problems and get angry. 4 is reasonable for a non-beginner. Any more requires ridiculous micromanaging.