Originally posted by gonk: ...Here's a loosely related question: "why do Blu-ray players typically have composite outputs?" (After all, who on Earth is going to buy a Blu-ray player and hook it up to any display that only has a composite video input!?!?) The answer I've gotten is that leaving a composite output helps in troubleshooting customer setups by eliminating resolution compatibility and other issues.
Gonk: Aside from what you correctly suggest, some people may use the composite output to feed a multiroom system. So far, those are mostly analog only.