But regarding flight ability, wouldn't that be V2? I thought there exist conditions where V1 is well below rotation speed.
Anyways,
> to make sure you can stop before the end of the runway
answers my main question, and makes sense from a procedural standpoint.
But still, hard to believe that there is no room for in-situ evaluation if runway overrun is worse than likely crash. Of course then again, those have to be split second decisions.