For me the NBL died when Acie Earl, Bennett Davison, James Smith and Kevin Brooks all left.
This is true, they have lost a lot of characters along the way too as well as talent to Europe and US.
Ask someone who doesn't follow basketball to name an NBL player... most of them will say "Gaze" still haha! Corey Homicide Williams was half way there, but then the Tigers sacked him and he hasn't returned!