If you live in a state with a single-use bag ban, your options are: buy a reusable bag for 50 cents, or travel 15 mins round trip to grab one of your bags.
Once you get home, you note that you already have a dozen reusable bags so you throw it away and stash one of your existing ones for next time.
I use reusable bags a lot, and did even before single-use ones were taxed, but maybe 5% of the time, I show up to the grocery store having forgotten one. I’m almost certain if I were in a state with a single-use ban my footprint would be higher (especially because I normally use paper bags when I forget, which have a negligible environmental impact).
IMO, the entire ban was a gift to the plastics industry. I’m sure the margins on these reusable bags are much higher.