I moved last month from a house with an in-ground pool in a quiet neighborhood with lots of sidewalks, parks, fields and kids nearby to a house on a busy street with a nice yard but no pool and nowhere to walk unsupervised. For the month of July, I relaxed the video game/screen time rules because we were so preoccupied with settling in. By the end of the month, my younger boys (10 & 12) were monsters - constantly bickering and fighting, sassing my nanny, and not going anywhere because they couldn't agree on anything. They would jump on the video games or TV as soon as they got up and then fight all day about whose turn it was. What a total waste of time and energy!
I took the controllers after work last Thursday. The plan was for them to be able to get them back at my nanny's discretion after they did some chores, some reading, something creative, and spent time outside. Well on Friday, without video games and NetFlix at their disposal, they played outside, made some cookies, did some chores, read books and when I got home from work, they and the nanny were playing Monopoly. Over the weekend we ran errands, did some chores, biked, went to the library, went to the beach, spent time with friends, etc. Yesterday, while I was at work, it was more reading, playing games, going outside, etc. They haven't asked for the controllers back yet.
For my kids, unlimited screen time tends to feed their worst tendencies and it's very easy for them to just zone out and waste the day. They rarely get to a point where they get sick of it and decide to do something else, so for them, it has to be in moderation and that moderation comes from someone else imposing rules.
For your son, if he's 14, it would really depend on what else he does all day. If he's being somewhat productive, social, and doing things throughout the day that engage his mind and body, then perhaps more time at night is fine. But to want to spend 8 or 10 hours a day or more gaming, obviously not OK.