i've always seen the flashy computer bits as something that isn't intended to be viewed literally, but rather a way to understand the mental models they had for things. in the same sense that i would explain something as "hopping into a box and poking around systemd to see what's on fire", the movie used big flashy graphics as a metaphor for the minds of expert users. i think that was the best possible choice to bring you into their world without requiring the viewer to have an expert understanding of the inner workings of a computer.