Self Checkout

I hate stores that have 10-20 registers but only 2-5 are open with cashiers

That means there are long lines at those registers and the self checkouts

I can’t believe that I’m suggesting this but if the store knows that the are never going to have more cashiers just tear down the unused registers and put in more of the damned self checkouts
Really the only time I've ever seen more than a handful of those things open is during the Thanksgiving-Christmas holiday season.