I’ve found two twitter chains that I can’t seem to make sense of.
From Jeremy Crawford:
"Actions and bonus actions aren’t interchangeable." [source]
Also from Jeremy Crawford:
"Double dash in one turn can happen with dash as bonus action." [source]
So how can a rogue use both their action and bonus action to dash twice with [Cunning Action]? It is specified in [Cunning Action] that the [Dash] can only be used with a bonus action.