Both my parents were from farm families. Fresh milk was allowed to stand until it clabbered and was eaten for dinner or as a snack. Most of us don't have that resource and while I have seen clabbered milk at the market, it's a bit thin, to my taste. I now make my own kefir which is a wonderful substitute. I like to add some half and half to my usual milk while making the kefir to add some richness.