I tend to run lighter tires than most people for trail riding, so inserts would work well with them.
That said, I’m pretty careful/precise with my line choice, so don’t often impact my rims. And have only had 2 pinch flats in years of riding MTB - both that I deserved because I wasn’t paying attention.
Also, I don’t often do drops like in the pic above, and if I do, I make sure the landing is good first.
I’ll probably be a holdout until the day I flat, and then I’ll become a convert😆