The martials rely on the casters conserving their resources.
The entire problem discussed in this 60+ page discussion is due to high level casters run by an experienced player never having to conserve resources and being able to afford to nova.
There's nothing stopping a caster of level 11 or above from casting 3 big spells every encounter in a 4 encounter day. That's before other class features and magic items.
That's not selfishness. That's smart.
The D&D designers have now realized this and this is why they gave the fighter and barbarian ways to nova. And the barbarian a way to use rage out of combat.
So do you have an actual response to what I said or are you going to continue talking past me?
The game does not need you to drain players to zero. Nothing in the game told you that this is a requirement, and it isn't one.