While I agree that fitting 10 pounds of shit in a 5 pound bag is not possible, which device's iteration/selection pressure is greater? What's the difference be

While I agree that fitting 10 pounds of shit in a 5 pound bag is not possible, which device's iteration/selection pressure is greater? What's the difference between gaming 3 years ago on the desktop, vs the mobile platform? I don't even enjoy mobile games usually, but to me it seems like the signs are written in the sand for anyone to see.