ozify

Hi! I'm sorry if this is not a related question, however, I'm curious to wonder why can't we upload custom JARs? Some people are people who make custom JARs and probably want to put it on their server, but I'm not speaking for everyone, heh. But to go back to my question, why can't we upload custom JARs? I know it might be because it could affect files or something, however, I would like a reason as to why. Thank you!