Stores seem to have dialed down some of the sensitivity. I don't know the last time I've run into a complaint because I used my own bag or something else that affects weight. One of my regular grocery stores doesn't have self-checkout. The other one has both and I'll wait for a cashier if I have a lot of items, especially produce. But if I have a handful of barcoded items I'll use self-checkout unless there is a cashier's lane with literally no wait.