Personally as a 6'7" guy I think there are good reasons for me riding on extra short 27.5 chainstays and for extra long ones on a 29 XXL super enduro too. You need to have one bike for flicking around corners and one for hammering the straight line. And the N+1 anyways.
Bicycles are always kind of too small for me, but if they get longer, they feel too big. I reckon this is because trails are made for the average people, hiking paths or black lines. And the trees hang too low.
I am quite happy too to have left the 90's nagging melodies (not only Frank Black, also Smashing Pumpkins and the like) far behind, although I must admit to become hooked again now and then.