Ironman is great. I love it - provided the game is balanced well for it.
In D&D tabletop, of course it's ironman - except you have a DM who can make sure that if he/she threw too much at you, he/she could cut a few monsters in the next encounter or 2, or allow a rest where there normally wouldn't be one.
In tabletop, the DM doesn't normally allow resting except at certain times and places. If they want a true 5e, D&D experience, they need to develop a way to lock resting unless it is needed or it is appropriate.
