Which of these technologies (listed below) would be very hard to create in Star Wars?
This Wiki page I've been editing for months with stuff I've read on the internet. Based on existing science and tech already available in Star Wars, which of these would be challenging for a scientist in Star Wars to create? Try to explain why and you can pick multiple entries. Remember, Star Wars is more advanced then the movies often show.
https://en.m.wikipedia.org/wiki/List_of_hypothetical_technologies