[sov]

I don't think this is the case. I played on a B/C-tier Overwatch team as the main DPS (mostly Tracer) for several months and I can tell you there is a stark difference in snap-reflex between non-caffeinated and caffeinated states, regardless of sleep amount. There were many other things I did to improve my reflexes and rote mechanical skill in general, but none made as much an obvious difference as caffeine.

[dmoy]

I did competitive fencing and we would chug caffeine during tournaments. Almost moreso for the metabolism boost though.

Because that latter effect you can build a huge tolerance for, you had to stay off of caffeine for everything but tournaments.

[thatoneuser]

Caffeine is obviously s performance enhancing drug. The ncaa has limits to how much caffeine you can have in you while performing, I’m sure other entities do as well.

[dmoy]

You need to drink a lot of caffeine (or pills I suppose) to go over the limits (unless they're a lot lower now?). We're talking like on the order of a gallon of coffee or something.