I'll just add that Data was previously built as a Vi plugin, but it was evil, so Doctor Soong disassembled it and shut it down. A lot of trouble could have been saved it Dr Soong had learned how to actually exit Vi.
The reason has been purged, intentionally forgotten. Vulcans train their entire lives to take on a dangerous task: once every 66 years, the very best of the best view the reason why Python is banned. Once viewed, the Vulcan confirms that it is indeed a just and necessary action to ban the ancient language.
After the task is complete, the Vulcan goes utterly, irretrievably insane and dies mere hours later.
Honestly I've always imagined them using a more natural interface just like when they speak to the computer. So when they run commands it's essentially ai driven, and so is what they see on their screens. Why ever touch a piece of code when an ai can manage it for you and offers a natural interface with flexibility. It would simply be inefficient to do it any other way.
@ZenkorSoraz To paraphrase a developer from the ‘80s: “I don't know what the language of the future will look like, but I know it will be called Fortran.”
If it's the original series, one has to assume that whatever programming is done, is done on a teletype. Nowhere in Star Trek:TOS is there a screen with words on it, because when the show was made... screens with words on them weren't how you got info from a computer.