I have some questions for people, especially the fans of the old/current rules... How often have you seen PCs with more than 1 or 2 level of Exhaustion? What is the most Exhaustion you have seen on PCs? And how did the party react to when a party member(s) ended up with a higher amount of Exhaustion?
My answers are that I have only seen more than 2 levels of Exhaustion once, when the party was doing a test set by a God and we had to just keep going and roll Con Saves or get Exhaustion. Several PCs ended up with 4 levels while others had only 1 by the end of the test (Those with 4 levels were considered to have failed the test). Once we were finished we had to change our plans because of how bad it was. We didn't want to do a tough fight we were originally planning with our frontline warrior so debilitated. So we abandoned our plan and left the area, travelling to another place to achieve something else. Travel involved riding flying creatures and was enough time to recover so we were ready to go once we arrive at the new location. Basically it stopped us from continuing in a dangerous area and changed our plans to deal with something else instead.
So how has it worked in your game?