We all want to see these under 21s boys do well and push on to the top team but most of them will never be good enough. Ange isn't playing them because they are not better than Gil, PEH, Skipp, Lo Celso, Royal, Davies, Dier etc. Other PL clubs aren't offering them contracts to play for them either. I personally think it is better for their development to skip playing under 21s and go play against men somewhere. If Spurs want to push for titles they need to buy even better players than they have now, pushing Donley and co. further down the pecking order.