It is amazing! A couple years ago I played through the Metroid series (not every game original/remake counted) and it was one of my top games. It did have one issue IMO, once you get the screw attack there is an expectation that you are familiar with how to use it, which as a new player, took me a very long time to get past. But other than that I loved my time with it & didn’t have any complaints!
It is the largest reason. Storing the password is one thing but to make the device reasonable to use I would likely store the key’s in TPM with a backup key. I don’t think she would be technical enough to use the backup keys were something additional to happen.
I don’t for a pretty simple reason. I have a wife, if something ever happened to me then she could end up a creek without a paddle. So by not having it encrypted then, anyone kinda technical can just pull data off the drive.
This sounds like you want ideas to spin up a crypto pump & dump scheme tbh.