I have a pal who loves them. He particularly loves films from his youth and I try to get them for him from op-shops. Mostly not available on DVD.
He's half blind, so the lower quality doesn't matter much, and he likes to be able to stop them when something he wants to watch on TV comes on, and just start the video again afterwards.
He also gets rabid about the 'zoning' on DVDs because we get many imports here, and his machine only plays zone 4 (oceania,) and he can't see the tiny print on the cover.