Sleeping bags are good but there are some benefits of using a blanket:
sleeping bags get wet like blanket and sleeping bags cant be dried by the fire
if fire camping to keep warm use blanket
if non fire use sleeping bag
blanket if covered in waterproof cover cold be put on outside of pack posse need a backpack with wooden frame, could build.
blanket doesn't tear either so good in debri shelter
blanket could sew us side so create a sort of sleeping bag
much more resilient when camping next to fire
sleeping bag would melt
blanket just gets a bit charred
could sew up side? or just roll round me and also put a silver blanket under or onto of it
if using fire or derby shelter use blanket
if tent or no fire/sharp bits use sleeping bag