I think my 16-year-old has. It’s on a shelf at the top of a closet, with other books we either don’t want them to read, or don’t want them to destroy (like the complete set of Horatio Hornblower novels).
I’m currently reading Tolkien to “teh byos,” who are 11, 9, 7, and 4. Sometimes the teenage girls (13 and 15) show up, too, if they’re not being allowed on the computer at the time. I tell them that every page has at least one word they might find on the SAT.
I read BoTR in the mid ‘70s. I’m inclined to think that one would have to have actually experienced the late ‘60s and early ‘70s to fully appreciate it. Haven’t picked it up since, so don’t know for sure, and don’t know how well it holds up.