Great point, but just mentioning (nitpicking?) that I never heard about machines/containers referred to as "livestock", but rather in my milieu it's always "pets" vs "cattle". I now wonder if it's a geographical thing.
We use the same analogy for the last 20 years or so. Provisioning 150 cattle servers take 15 minutes or so, and we can provision a pet in a couple of hours, at most.
[0]: https://www.engineyard.com/blog/pets-vs-cattle/
*: Engine Yard post notes that Microsoft's Bill Baker used the term earlier, though CERN's date (2012) checks out with our effort timeline and how we got started.
this tweet by Tim Bell seems to indicate shared credit with Bill Baker and Randy Bias
https://x.com/noggin143/status/354666097691205633
@randybias @dberkholz CERN's presentation of pets and cattle was derived from Randy's (and Bill Baker's previously).
Before you call this pattern silly, consider that the fairly normal plural “Unices” is by analogy with Latin plurals in -x = -c|s ~ -c|ēs, where I’ve expanded -x into -cs to make it clear that the Latin singular comprises a noun stem ending in -c- and a (nominative) singular ending -s, which does exist in Latin but is otherwise completely nonexistent in English. (This is extra funny for Unix < Unics < Multics.) Analogies are the order of the day in this language.
Also, probably because of approaching graybeard territory, Thinking about boxen of VAXen running UNIXen makes me feel warm and fuzzy. :D