Yes. It's mildly embarrassing but I've learned most languages and tech in the same way: buy a book, leave it in the bathroom and whenever I pee or poop I open it at a random page and read. If it's a new page, good if not then it's a good refresh. With ebooks it just doesn't work, with mobile devices I get distracted.
Seriously though, I hadn't thought about using that time (which most people are guaranteed to have every single day, several times a day) for learning new things. I think I may start using this method for exploring things that I'd "like to learn some day" but that aren't urgent/currently important for my job. This would be a way to at least make me get started learning something genuinely new!