After Yoda was gone he seemed to dissapear quite quick. Vader seemed to not dissapear we didn't see him to dissapear so we dunno if vaders body was burnt or if it was just the armor. Tbh I think the smart thing to do was show him dissapear but I guess they didn't show because they wanted to make it surprise at the end like 'wow Anakins a force ghost now, everythings ok.' How come they changed the ending of ROTJ to Hayden being the force ghost?