I built a CI service many moons ago (was https://greenhouseci.com back then) on the premise that _most_ companies don't actually require a hugely complicated setup and don't actually need all the flexibility / complexity that most CI systems have.

After talking to tens and tens of companies with apparent complex CI requirements, I still stand by that assertion. When drilling down into _why_ they say they need all that configurability, it's sometimes as easy as "but FAANG is doing X so my 5 person team needs it as well".