Worth noting before we get all dewey eyed and romantic about youth programmes:-
There is inherently a huge amount of wastage in them. Under Robins we have had Bayliss and Shipley in year 1 but nobody has established themselves since - two players in four years and none in the last three. And judging by what is happening at Gillingham, Eccles looks unlikely to make it through to our 1st team.
Unless you sell on, youth programmes are a very expensive way to acquire players. Out of contract remains the cheapest way - O'Hare, Kelly, Allen, MacFadz, Dabo, Rose (I think), Walker (I think) Marosi, Wilson. With the exception of Kelly, all in just the last 18 months. You know what you are getting, which you don't with an 8 year old.
The higher you go, the more that becomes true. League 2 is a good entry level for a young player, Championship is not.
The additional trick in order to get more throughput through the high fixed cost of an academy has been having a development programme- Hyam, Westbrook, MacCallum. It's a shorter time frame in which to get a return on your investment - one to two years as against 8-10 for a youth player.
Saturday's team by source
Out of contract: Wilson, Dabo, MacFadz, Kelly, Walker, O'Hare
Loan: Ostigaard (MacCallum)
Development; Hyam, MacCallum
Purchase: Biamou (small fee?), Hamer
Youth: A big fat zero
You can see why the accountants look at youth programmes and say "this is genuinely a long odds bet - 20-30 players for one star who makes big bucks."
Note the rules for Premiership clubs are different. You could run a couple of academies on Pogba's wages.