The bun makers realized 30 years ago they could charge almost the same for 8 buns as they did 12 and removed the superfluous buns to match the packs of dogs. Haven’t seen anything bigger than an 8-pack in 30 years except at Costco or restaurant supply places.
At Walmart last week I found a package of 4 buns, but they were Keto. Still bought them ‘cause I hate throwing away half of a package. They were delicious.