So, RAW, you can move up to your speed while incapacitated, but you cannot take the Dash action?
5B said:An incapacitated creature can’t take actions or reactions.
5B said:Sometimes an attacker wants to incapacitate a foe, rather than deal a killing blow. When an attacker reduces a creature to 0 hit points with a melee attack, the attacker can knock the creature out...The creature falls unconscious and is stable.

Real question is What Incapacitates?
Real question is What Incapacitates?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.