Ask HN: What topics do you enjoy learning about in your free time?

Video game speed running is fascinating. Learning about how people essentially break games en masse is interesting even though I don’t do it

Channels like Karl jobst do a great job of explaining what’s going on

Responsible parenting. Learning how to deal with my teenagers and help them become good citizens. I'm glad there are a lot of helpful tips and articles online. Though our own experience is the best teacher for this topic.