[Andrew]

Downsides are more to do with technological advancement and society changes since the the 80s. Would audio only communication work in an age of 5G video calls? Are helicopters too environmentally unfriendly? When the internet has the answer to anything, would using reference books be seen as twee? The 2002 revival used Encyclopaedia Britannica on CD-ROM but even that is old fashioned now. Are bookish middle-class and middle aged contestants the type of person the modern viewer wants to watch win a prize?

I think you’ve basically summed up why Treasure Hunt wouldn’t work.

It’s bad enough during the treasure hunt week on The Apprentice where they can’t use the internet or phones, it would really stand out if it was the entire format.