The one thing that rubbed me the wrong way is that it treats the underlying host as “disposable”, in that it intentionally does not support in-place OS upgrades. As in, if you want to jump from an older LTS to the most recent, you need to explicitly spin up a blank, new LTS host, run the installation script from scratch, and then restore the data from an overnight backup.

I can understand an immutable container/binary with external data storage and config settings, but flipping the script and locking down the underlying OS? Yeah, that seems excessively unnecessary.