You think a farm can be built in less than 3 years?
Even if it can, you still expect results on the ML level by year 3?
Seriously, can you reply to this?
One problem with the plan we are speaking about was that it was never implemented in full. There was always the "try and win now, too" aspect to planning. We never had a tear down-rebuild phase. Many of the trades we made that netted us prospects also included veterans, like Verdugo, Pivetta & Cordero, so expecting better from the prospects we did get was maybe just wishful thinking.
Some of the model teams we see winning now, that still have good farms, like ATL, HOU and LAD did not build up their farms in 2 years. The Astros tanked for several years to build their up, but they can now keep winning even when they lose some key free agents like Springer, Cole and Correa. The Braves have shown how to build up a farm and lock up younger players, long term, early on. The Dodgers have found a way to keep their farm strong for many years, but they often buy a high need player rather than trade their best prospects for one, although they still do, at times.