I’d be curious to know this as well. I’m not entirely sure it’s “the last thing they buy” considering it’s dirt cheap in comparison to other Apple products and (arguably) a very nice product with lots of great features, but I could definitely be wrong here.
Full disclosure, I’m an Apple fanboy for sure but I’m also a UX designer and really appreciate how easy the Apple TV interface is to use. I bought my 72 year old mother one for Christmas a couple years ago (she’s an Android user) and it’s honestly the only tech she doesn’t call me asking how to use. In fact, she freaking loves that thing.