Nobody lacks it seeing as how the vast majority is rushed to Hell difficulty and then proceeds to cow runs to level quickly to 85+ and points are then sank into respective stats including vitality (minus sorceress?) which boosts stamina. Everybody always be running without affect to stamina bar or just teleporting unless they feel like strutting their stuff. If you were to boost starting stamina on every class or amount gained per point deposited into vitality then you could either remove stamina potions entirely or give them a new purpose and place in gold vendor.