6x seems to be the limit for learning new things?
9x seems to be the limit for entertainment?

haven't tried going over that (shitty Internet). Any research made on the matter? Is sustained 9x even humanly possible? Helps with focus but makes you mentally exhausted after 90min max.

Also all retards who are right now typing
> what's the point of watching movies on 9x speed
FUCK OFF
same goes for
> wtf anything beyond 2x speed is impossible
because it's possible and you are mentally retarded