In The Last Jedi, The Resistance is running away from the First Order fleet, and they have 4 ships: a Heavy Cruiser (The Raddus), and 3 support ships: a "Bunkerbuster" (The Ninka), a Medical Frigate (The Anodyne), and a Cargo Frigate (The Vigil). They bring all 4 ships along with them, and the support ships gradually run out of fuel and get destroyed.
It sure seemed like they knew this was going to happen. They didn't seem surprised at all, just sad about the (unavoidable) loss.
My question is:
If the support ships are going to be lost eventually anyway, what's the point of bringing them along? If they'd evacuated those ships right away and transferred the fuel to The Raddus, wouldn't they have made it farther before running out?