I wouldn’t doubt if Tony left because another position was NOT awarded to him or because, if it was me, his brother was forced out.
I have heard some of Donny’s demise but...I am not buying Tony left because DD3 got his brothers job...
I also don’t believe the three Ds wouldn’t join forces again... That is the biggest part of this story I am not buying.
The Dedanatis’s blood runs pretty think when it comes to family and friends...
My guess is Donny jr had limited band width when it came to naming positions on the way out and he put all his efforts into his son following him up. and yes..I am rooting for DD3 to succeed.