Report coauthor here.

The weaknesses of XTS mode are mostly limitations imposed by full-disk encryption. You should think of XTS as fine for FDE, but you also shouldn't put too many expectations on FDE. FDE is great if you leave your powered-off laptop in the back of a cab. It's not great if federal agents distract you and steal your powered-on-and-logged-in laptop at the library.

You should definitely use FDE, but you should also separately encrypt the things that are really important to you.