Comment by candiddevmike

The problem with immutable images is you need a complimentary config management tool to manage them at scale. That's why we built Etcha[0] (config management for 1000+ devices) and then built an immutable OS (EtchaOS) around it--they're meant to work together instead of "cloud-init is good enough". cloud-init is terrible at scale, especially outside of public cloud.

0 - https://etcha.dev