Wait what they said "more food is used at higher levels"?
Experienced heroes eat more? Eh?
That's how I understood it.
The exact quote is:
"You will notice that as you continue playing the game the cost of going to rest is going to increase as you level up and that actually reflects the growing upkeep of your ever increasing camp in the game"
From
update 13 video, Sven talks about resting around 5:27. I have seen no food requirement increase throughout my playthrough - not with gained levels, not with recruited followers nor companions.
