Comment by maratc

CASC plugin + seed jobs keep all your jobs/configurations in files and update them as needed, and k8s + Helm charts can keep the rest of config (plugins, script approvals, nodes, ...) in a manageable file-based state as well.

We have our main node in a state that we can move it anywhere in a couple of minutes with almost no downtime.

I'll add another point to "Pros": Jenkins is FOSS and it costs $0 per developer per month.