[peterwwillis]

The major use case for Docker is really as a massively simplified package manager and an entrypoint for distributed applictions. Other features, like quicker runtime than VMs and system isolation, are just icing on the cake.

It took a massive marketing campaign to get people to use Docker and realize it made their life easier, so something like iocage would need the same push. (Also, nobody wants to start adopting additional OSes unless absolutely necessary)

[halbritt]

Immutability is pretty cool. Also the sibling to that where you're running the same immutable artifact in all of your environments.

Any kind of isolation is just icing on the cake.