Indeed. Unfortunately, for whatever reason we currently seem to have an almost total dearth of players in the 20-22 bracket who would be better suited to the rigours of Championship football.
We do have a couple of players in that age bracket, Tahvon Campbell and Shaun Donnellan are nearly 20, Jack Rose is 21, Alex Palmer is 20, Callum Jones is 20 and Kyle Howkins is 20.
The thing is, players in that 21-22 age bracket who haven't already tasted first team football are usually allowed to further their careers elsewhere, rather than being held back. Think Keemar Roofe and Chris Wood at Leeds, Donervan Daniels at Wigan, Bradley Garmston at Gillingham, Josh Ezewele at Yeovil, Adil Nabi at Peterborough, Liam O'Neil at Chesterfield, Wes Atkinson at Notts County, Alex Jones at Birmingham, George Thorne at Derby, Romaine Sawyers at Brentford, Sam Mantom at Walsall, Paul Downing at MK Dons and James Hurst at Torquay, not to forget last season's top under 21 scorer Samir Nabi, who will no doubt sign for a football league team soon.
The other factor is that our most promising players from those particular squads, players like Isaiah Brown and Jerome Sinclair, were snatched form us at 15/16, cutting down on the success of those particular year groups.
Still, the above list is impressive for a production rate in recent years.