This is cool. Overlayfs IS a huge difference in performance due to fs level caching amount namespaces. Hopefully btrfs will get that too, some day.

I must say however, I dont like the pod concept too much. That locks you in a bit.

Additionally and in a different register, the deployment systems, while these work fine when you have to the time to do things right, dont work so well in practice.

All companies that I know of which have 1k employes or less (ie most) basically dont update anything automatically because the redeployment might still fail. And of course, manual labor costs a lot of human resources.

We still need a better way to separate the system update process from the deployment, settings, and app.