1/ so, in an alternate timeline where the #YS11 came out 2 years earlier, I imagine that head start would give the #YS-11 more of a fighting chance to become a commercial success, with more sales of the YS-11 and likely follow-on models, probably including a pure jet airliner by the mid-'70s. I'm picturing a new YS-11 variant in the middle to late 80s with new engines and modernized avionics as a follow-on model.