don't worry too much then because pretty much anyone can do them. triples on the other hand..
Depends on how nice and big they make jumps. Especially at competitions.
Big enough, with landings that can take it, I'm sure there'll be triples all over the place. It'll be epic, the only thing I'm worried about is how many kids are going to have to risk serious injury to be competitive. Which is already happening with doubles, so oh well.
Maybe 4-5 years, and it'll be where doubles are now? imo