The point is that you don't have a separate password just for the disk encryption. It all works transparently.

The downside is after all that, is you end up with an running Ubuntu system, and you realise you're running a shitty NIH Debian fork.

How often do you reboot your laptop anyway? It takes a couple seconds to type in a well-rehearsed passphrase.

When I reboot mine it's actually three passwords that I need to put in: disk encryption, linux login, and firefox master key.