Comment 3 for bug 2003387

Marking all packages as 'auto' like that is not supported.

Besides cryptsetup and lvm2, there are several other packages that are available for the installer and only kept on the system if they are needed:

https://git.launchpad.net/~ubuntu-core-dev/ubuntu-seeds/+git/ubuntu/tree/ship-live

The installer also includes support for many languages but only English and the configured language is kept on the installed system.

We will likely close this bug since this is intended behavior.