Nothing really changes.
I shall probably put the cat amongst the pigeons with this but in the early 60s when I was a mentor at Heathrow we received the first of the Cadets i.e. 1, 2 and then 3 course (in those days the cadets spent, as I remember, three years training and did both Area and Airfield) and the consensus after the first year amongst the mentors was that the standard of the Cadets was much lower than the direct entry people from the Services and that the big problem was going to be in the future when they became the management of ATC. I think that that opinion has now been proved correct. It was those who couldn’t hang up their headsets quickly enough and get to desk jobs that are now your bosses—nuf said.