There's another great (and long) read on PetaPixel, a very well researched analysis on why Fuji survived and thrived while Kodak died a slow but sure death. In short, it was lack of diversification and failure to adapt its business models to the changing market, but the article goes deep into it. One of the best pieces I have ever read on the topic, give it a go when you have some spare time...
https://petapixel.com/2018/10/19/why-kodak-died-and-fujifilm-thrived-a-tale-of-two-film-companies/