I’d be down for the hard difficulty reducing the available food in the game by half. Or I guess just doubling the food costs or halving the food’s effectiveness might be easier ways to get the same effect.

Will the make a difference in the long run? Probably not, but it would spice up the early game at least.

As it is I already play the game resting as seldom as possible. Usually I’m at least level 3, if not 4, before I take my first long rest, so they’d really need to limit resources to actually make a tangible difference.