I’m 58 years old, and I don’t do really much crazy stuff anymore because it takes longer to bounce back from injuries, and I’ve got enough old ones that I’m nursing along. These days I’m more about technical ascents than I am about descending. Aside from a helmet and gloves the only protection I wear is a hydration pack with spine protection.
I’d be more into aggressive riding if there were a more comprehensive solution than knee and elbow pads — at a minimum spine and clavicle protection — that was lightweight and comfortable to wear. Some chest and hip padding would be nice, as would penetration protection from things like branches. I’ve looked into mountain bike armor but I’ve never heard from anyone who uses it for trail riding.