I prefer ebooks for reading, in general, (though some books are still better in hard copy), but don't buy many ukulele books at this point. When I do, I often buy the ebook version, and then just print anything that I've decided to work on. (Doing a trial run of it before wasting paper and ink.) I probably just don't have the right set-up for using the digital format for reading music/tabs, but I find it awkward, for whatever reason.
One advantage of ebooks is that I can bring it with me where ever I go. If I have a few spare minutes at any time, I can always spend it with an ebook.
Any format of book might get lost in some way. Having had the house flood, (I'm now a fan of FEMA), I know that any physical item I own might meet with disaster. For digital format, I keep a back-up at home, as well as a back-up at another location, so at least I can recover what I need, most likely, if disaster or mishap of any sort strikes. I'm not a cloud user, but that might be another option to help preserve things in a digital format.
I have dogs who like to munch on books, (one dog was particular, and mostly chewed on dog training books, LOL), but they fortunately have always left my electronic devices alone. It's just not the same as ripping paper, I guess.
Pros and cons of each, so I voted in the "it depends" category, since I might buy either format.