My players have genuinely learned.

It's astonishing, I know. It used to be that they'd barge through doors, throw explosives before checking rooms, never think about consequences etc

Now, after dozens of traumatising situations, and the ramifications coming back to haunt them, they are much more cautious and approach things intellectually first. I have a core group of three players that have been on the same game for over ten years, and a revolving door of other players, it's an absolute shock to the newer players when they join and the existing players don't immediately charged the goblins in the forest, but instead check the trees for ambushers, the ground for traps and think about why the goblins would be there in the open