Hi guys. If I may, I'd like to say that the only limits are the ones that you set on yourself.
I spent all of my 20s doing moguls, and really didn't even get a chance to get into the newschool stuff until after that. I did my first doubles at 30, and did my first 900 when I was 34. Sure there has been the odd injury along the way, but it still feels worth it to me.
Learning anything new is exhilarating, I still plan on learning tons of new stuff, on rails, jumps, bc, everywhere.
I like to look at guys like Ken Bradshaw, who is in his 50s and towing into 60+ foot waves that can tear a person into pieces.
Exercise, stretching, and a positive attitude will keep all of you guys progressing for as long as you want to....... stay stoked, and you will stay young!