Hey I didn't suggest it.

At any rate it would all climax (or not, if the handover goes smoothly) with the coming of age of the two young Princes. One fairly short paragraph in the rules and the effects would end in under 16 years into the game.

Funny idea, say people vote for the Stewards. Well, unlike KOTR all rules are changable, so a very, very powerful steward could not only refuse to hand over the title, but have the rules changed so noone could do anything about it.