Following on from this thread from 2013 (https://www.alternatehistory.com/forum/threads/king-for-a-day-duke-for-a-lifetime.296626/), how different would things be if Duarte (Edward), Duke of Guimarães (https://en.wikipedia.org/wiki/Infante_Duarte,_5th_Duke_of_Guimarães), had not died in 1576...