I gained a ton after sitting through family dinners at my SO parents and grand parents. Initially I was bored out of my mind. Gradually I adapted and suffered less and less.
But I don't see it as something positive. I feel like it broke my mind in some way. It replaced frantically struggling against boredom with nearly catathonic apathy.
It feels more like a learned helplessness than improvement.
If you are in the rain for few minutes you are running and hiding. If you are in the rain for few hours you can no longer give a fuck as your feet melt in swampy shoes.