I suspect the original soup is more a nod to thrift than being exclusive (“I liked generational soup before it was cool… as did my gandparents before me.”)
Agree on the sourdough starter, though. After an unfortunate accident with a cheap jar, our own summertime starter (age:a few weeks) was reduced greatly in volume, where we only had a few spoonfuls left. Slow-brained me finally figured out that it didn’t make sense to try and maintain a big colony, and I’ve never liked the discard-half wastefulness of the classic sourdough magic spell. Now there’s just a few ounces in a jar in the fridge, and when we bake, a spoonful or two is plopped into wet flour and left to sit overnight in a covered bowl like a “seed” to get things going.
I figure it’s exactly the same priciple as using packaged yeast in dough and letting it prove – the packaged stuff and the sourdough seed have a numerical advantage over airborne spores, and colonize first.
Is there any reason to keep a lot of unused started around in a massive crock for months or years? So far I haven’t found one.
Our Italian neighbors growing up used to do this, but with a pot of red sauce supplemented with whatever the dad brought home from work (he was a butcher). I liked it when it was pork chops and spaghetti
Pease porridge hot, pease porridge cold, Pease porridge in the pot, nine days old; Some like it hot, some like it cold, Some like it in the pot, nine days old.
That’s also a recurring theme in historical ship conservation. If more than 80% of a ship has been replaced piecemeal, is it still the original ship or a faithful reproduction?