-----"They do not experience extreme happiness nor do they experience extreme sadness."

I find that, being in my late 50's, I am finally free from the highs and lows of emotions. I think emotions tend to have less amplitude the older we get, and all that drama from the lows and happiness highs experienced in younger years goes away - which is a good thing.

This way of being feels much better for me and more realistic.

I don't need intense lows to experience something even way better than brief periods of intense happiness - contentment and satisfaction