The consensus of opinion according to nearly everyone who saw the original conclusion - which included a tour of the decaying Amberson mansion - was that it was much more powerful than the tacked-on "happy" ending.
One of former silent star Dolores Costello's last roles. She was forced to retire from the film business as her face had become badly scarred by early film makeup, which was highly caustic.
The lost footage of Orson Welles's original cut of the film has earned a sort of "Holy Grail" status among film fans. A number of high-profile Hollywood figures have embarked on searches for the footage in the vaults at Paramount Studios (which absorbed the RKO lot and archives) and around Los Angeles, including Peter Bogdanovich, Francis Ford Coppola, Henry Jaglom, and William Friedkin. Friedkin, in particular, spent years scouring Paramount, as he was married to longtime studio boss Sherry Lansing. As of 2018, none of their searches has turned up the missing footage.
Composer Bernard Herrmann had his name removed from the credits to protest the way RKO tampered with his work.
A print of Orson Welles' rough cut allegedly was sent to the director on location in Brazil. It has yet to be found.