Just looked it up and Sunderland came up playing acedemy players an average of around 26% that season (figures from chat gpt so take with a pinch of salt) and this season is still very high where as the rest of the league have around 10% with pattison playing almost every minute, this saves them a fortune in wages and now they have European money on that. Say what you want but they seem to be run really well and there's no reason they won't push on.