There's a new book out [1] that examines the role of technology in the early film industry. One of the tensions is between the camera, sound, and lighting technologies mainly based in East Coast cities such as Rochester (home to Kodak, which basically had a monopoly on film production until DuPont entered the fray) and the production studios in Hollywood. Rival technical societies (including the organization that now hosts the Oscars) developed that mostly catered to an East Coast or West Coast audience. In an era before jet travel, attending a technical conference in New York was a much bigger commitment for a cameraman based in California.
The movie business was also for quite some time a niche audience. There wasn't much of a market in developing specialty cameras for Hollywood--the real money was in home movies. A few firms such as Technicolor emerged to cater directly to the movie picture industry. Eventually, a tech cluster developed in Los Angeles.
And regarding Fort Lee, my understanding is that it remained a center of the animation industry until around the 1940s when Walt Disney moved to California.
[1] Engineering Hollywood: Technology, Technicians, and the Science of Building the Studio System by Luci Marzola. https://global.oup.com/academic/product/engineering-hollywoo...