I honestly haven’t found any good reading material other then the arch wiki which indeed vaguely outlines pros and cons, and I was wondering if the only significant advantage Is that you dont have go type your password in… Which ita a big advantage if you dont mind cold boot attacks … Also automatic login Is handy if you dont mind privacy at all … What do you think?
Together with secure boot and your own signing keys, it could be a good way to en/decrypt the a dm-verity secured read-only rootfs. But for the home partition I would probably still want to enter my own decryption key, maybe via systemd-homed. From there you can update the kernel/initramfs and read-only rootfs image and sign them for the next boot.
This is complicated to set up. Otherwise maybe use TPM as a 2FA, so you still have to enter a pin?