Raj Ji was the last hardworking man in the entire family of Kapoors. He acted, directed and produced hit movies but his brothers and sons were not that hardworking and active due to reasons known only to them. Shashiji created his own legacy in Prithvi Theater and his siblings have taken over after his death unlike Raj Kapoorji's. Part of RK Studio was already sold to Kalpataru's a decade or so back and now the remaining part is also being sold.
All the best to The First Family of Hindi Cinema in their future endeavor. They have chosen not to follow the legacy of Raj Kapoorji but I'm sure they will create their own.