Potential downsides of buying a brand new soft-unlocked (carrier-unlocked) phone?

I’m looking to buy a Pixel 7 Pro and found a local shop offering two options: brand new and “brand new, soft-unlocked.” I was told the soft-unlocked version is carrier-unlocked (likely from US carriers like Verizon) and will remain unlocked unless I factory reset it. If I do reset it, they said it’s a quick 5-minute fix...