I think people are downplaying how vital and how good Ederson is. Ortega is an excellent number 2 but he's nowhere near Eddy. He may be a slightly better shot stopper but Ederson positioning is unreal, he hardly ever has to dive to make a save. He commands his area completely, actually catches crosses which hardly any other modern keepers do, he is brave as a lion and puts his head where others wouldn't put their feet. His distribution is second to none in the entire history of football. Coming in for the odd cup game is completely different to the pressure of being number 1.