Screen time and teenagers?

For those of us with teenagers? How do we manage their screentime? I don’t have a teenager yet but the finding the balance between the teen’s autonomy and adult supervision seems very difficult.

I was lucky enough to grow up in a generation where the quality of technology was so crappy that we didn’t stay on for long periods of time. This is not the case these days.

Anyone have any resources, methods, concerns, or questions on this topic?