Just A Minute

 

Is it not just that fewer people were listening and recording these shows when they were first broadcast? You often seem to hear Nick say something to the effect of “When Kenneth died, people thought the show would die with him.”

That's what he said in that JAM documentary, but the key word here is "thought" - it didn't happen. In that same documentary it was also said (I think by Clement but it might have been Nic) that in fact the number of listeners *increased* after Kenneth died.
So the show did not have fewer listeners in the 90s, not according to this documentary at least.