I would definitely try one for our next bed. Wife and I bought a quality medium pillow top. Was still to firm firm for me cause I've had Sciatica now for a few years. I bought a 3" soft latex topper. Not a foam store piece. Think it was like $600. BEST investment. I'm a side sleeper and sleeping on a mattress, even a quality pillow top, it felt like all my weight was on my shoulder and hip. With the latex topper the support is distributed more evenly.

I was going to look at one of those "Purple" mattresses. They have an even thicker 4" topper. https://purple.com/mattresses/hybrid-premier