Rick Dalton said:
If that was your first reaction, I don't think that watching Citizen Kane and then revisiting Mank is going to move the needle that much. I watched both of them in one evening and that was admittedly too much, I was exhausted by the end of the night. I've always appreciated Citizen Kane and can understand why many consider it "the greatest movie of all-time," but I didn't grow up watching it and therefore have more affinity for the films that it influenced, e.g Lawrence of Arabia and There Will Be Blood, among many others. The movie backstory that I really want to see is Francis and The Godfather since that's a film that I've seen dozens of times and the story of how it was made is a Hollywood legend.
This article (spoilers) dives into a lot of the Citizen Kane references, personal backstories and what was real versus embellished, but even it was hard for me to get through. There are some movies where I love diving into that level of detail (OUATIH, Tenet, Blade Runner 2049, etc.), but surprisingly (and sadly) this isn't one of them.
If you want a little sneak peak, I posted the script below. It's so damn good. Admittedly, I haven't read the entire thing, as I want to preserve a bit of mystery, but I absolutely loved what I did read...
http://www.mediafire.com/file/3ugnyaw1ldhi0hq/Francis_and_The_Godfather.pdf/file