under 19s league for SPL has been running for probably around 8 or 9 years. But this leaves a huge gap between 19s and first team level, so only the very best are offered full time, which in turn probably for most would mean 2 or 3 years training but not playing in the first team squad. 21s were likely stopped to cut the clubs wage bill, as you cant pay a fulltime player of 21 years old 100 quid a week.
Caley D was right with the relegation lost a two year age group, but it was the year they got promoted that they had a very young squad, and believe Ryan Christie may be the only 16 year old selected this year, as Liam Polworth was the previous season.
Im sure the coaches are told by the SPL/SFA that its enjoyment and taking part that matters, but show me a coach who would want to lose every week, they will want to win as much as the players do.
If you look at the spl website, and click under 19s you can get the historic tables, and this years. think our best years were when Rory was here, with Vigurs, Ross, Gav Morrison, and the lad now at Elgin.