Tangentially related, I recall being a teenager playing video games until 3am in my bedroom. As I grew up and got my own place, I eventually decided to have no TV in my bedroom and my sleep improved a huge amount ever since. I’m not perfect, I’ll sometimes go into a negative spiral playing chess until late and get more worked up, but once every few weeks/months is a marked improvement on every night!

Definitely something to consider if I ever become a parent.