This could be done in part, because the equipment was very inexpensive. Not much money was involved in tooling so that basic changes of that type could be accomplished.
“And it's always possible that you will not get a nice review. So - and that's enraging of course, to get a bad review, you can't talk back, and it's sort of shaming in a way.”
“As a writer, you get to play, you get alter time, you get to come up with the smart lines and the clever comebacks you wish you'd thought of.”