Makes sense to me that a ship would need to accelerate to the proverbial 88mph to punch a hole through realspace in order to enter hyperspace. *shrug*
But 88mph is a normal speed, and it’s completely evident from TLJ, that the Supremacy was hit at a much greater speed than normal speed, and the ship was accelerating to lightspeed, which is a contradiction in terms.
So the only two options are 88mph and lightspeed? There’s nothing in-between?