Crosby is absolutely unreal and his point per game season streak is insane... *buuuut*, it is weird to me that there's no minimum game requirement for that. 1/5 of his seasons were <42 games. Now, would he have gotten the point per game in those? *probably*, but one year in particular he only had 47 in 41 which is far from a guarantee.
Gretkzy's point per game seasons streak was the first 19 of his career - what happened in teh 20th season? He was *at* a point per game through 56 games... Then hit a cold streak down the stretch and missed it with 62 points in 70 games. Point being: you never know how someone will finish a year until it's played.