[Kiro]

> Just like Alex Trebek is probably a big part of the reason for Jeopardy's longevity

Considering Jeopardy has spread and become immensely popular with similar longevity all over the world, I don't think that's true. It's about the format, not the host.

We also see the same thing happening with the Swedish version of HQ Trivia (called Primetime). It started out extremely popular but lost a lot of momentum fast. They haven't changed hosts so I think that what you say about shelf life is much more intrinsic to the format itself.