A lot of people I know in the tech space seem to love Costco. I've been. It's fine -- compared to a lot of other dingy, sad, depressing grocery stores, it is absolute MILES better. So I understand the fondness.
But for me, it can never compare to Wegmans. At Wegmans, the store brand is always a sensible default purchase in a category, and often the best option in a category. The employees all seem happy because Wegmans has been one of the best blue collar employers in the country for a couple of decades now. The hot bar, burger shop, and sub shop are all fantastic: relatively cheap, and often better than any fast/casual alternatives in the area. They have a great beer selection, if you live in a state that allows beer sales in grocery stores.
Caveat: if you've only ever visited the Brooklyn Wegmans, or honestly any Wegmans outside of the core central-western NY zone, you're missing out on the best qualities of Wegmans. For whatever reason, the stores they've started in new regions in the past few years just don't capture the same Wegmans spirit. The creme de la creme Platonic form Wegmans will forever be Rochester's Pittsford Plaza location. If you're ever in Rochester, it's worth the visit.