this is such an outdated criticism. our academy went down the drain post Van Gaal's stint as the club's sporting director in the early-mid 2000s (around the time our last golden generation with Van der Vaart, Sneijder, etc. broke through).
we then had a decade of completely bland products.
but since the Cruijff revolution with Jonk overthrowing the academy it's been flourishing again.
That last season's team still had De Ligt, Van de Beek, Mazraoui, Blind who were all here from the age of 9-12. The biggest talent of the De Jong, Van de Beek generation was Nouri who was also here from the age of 9 but tragically wasn't part of that team or would have been on the list as well.
Holland just won the U17 euros with a really talented team that had like 7-8 of the 11 starters being from our academy.
There's also a lot of our players being nabbed from us around the age of 16 as well that would have otherwise made it (sometimes instead of the ones we attracted in their place who broke through instead that you're criticising us for)
For example, Donyell Malen left us at 16 for Chelsea. then returned back to PSV and broke through as a Dutch international last season. Dilrosun left us at 16 for City and broke through as Dutch international at Hertha last season. Redan for Chelsea. Hoogewerf recently for you guys. Those were all pretty close to top talents at the time of their departure (dilrosun less so maybe than the others), but you can't really hold that against our academy. imo TFM would have been a great centreback nowadays if he hadn't left us as well.