I'm not sure on the gas station growler fills but it seems like thats been relegated to the fancier bottle shops. Even most breweries have most options in crowlers or cans now. I'm a fan because I can get a few different 16oz cans instead of a growler that I have to drink in a couple days.A little off topic but I'm so shocked how fast growlers died. My wife bought me a real nice stainless steel 64oz one and I had tons of glass jars. Places like Kum and Go and nearly all Hy-Vees in the Des Moines metro had growler fills and then boom they seem to die out. I know that Covid hurt but they were really dying out before Covid hit.I know that crowlers seem to take over for tap rooms/bars.
From a staffing standpoint the prefilled crowlers make a lot of sense. My biggest gripe was that some breweries would try to force me to use their growler which I had an ethical issue with.