He developed some youngsters, but mostly because his hands were tied. Dortmund was basically built around signing young, highly talented players, as they can't/couldn't compete with other top clubs money wise. Liverpool has/had some serious weak spots, which made him look towards youngsters.
At Juve we don't have that. We are stacked in pretty much every position. We don't need to rely and hope on youngsters having their breakthrough. That said, the few youngsters who are good enough for Juve DO get developed by Max. It just takes longer, cause as i said, we are already stacked and simply can't offer them as much playing time as other clubs can.