But to your point (sorry I missed it first) - assuming kubernetes is like assuming an OS, you get to do things like preview apps and other benefits.

But if that isn’t for you https://www.cloudbees.com/products/cloudbees-jenkins-distrib... aims to simplify the Jenkins config.

well as far as I know bash and gcc don't depend on kubernetes yet, but that is a good point.

It isnt' for everyone (and I wouldn't want to run it myself - GKE or EKS is fine but otherwise.. it seems tough to run).

Also this is really a starting point for Jenkins X - I expect options for non kubernetes to be coming.