Check out SporkFuMasters thread. His full body sculpts are never over 1 million if he still works like I know him. We first met each other when Sculptris was first free app doing dynamic tessellation and 2 million polys were a risk on PC. He is doing details with 300k you would think he uses 3million.
My mushroom scene has 5.3 million polys - altogether and I was lazy in reducing.
Shrooom
I promise, if you learn how to balance your topology, you’ll be able to do ten times more content on your “old” iPad. Without any optical difference!
Only if you do very fine detail, like skin structure, or very sharp edges for hard surface this high poly amount make sense.