I would contest that, The CPU power advantage was considerable, the 68000 took 4 clocks to add two registers, anything fancier took more, compared to the ARM

I would contest that, The CPU power advantage was considerable, the 68000 took 4 clocks to add two registers, anything fancier took more, compared to the ARM where you could build the kitchen sink and shift it across a bit in a clock. That was why the 3D performance was so much better. but to gain the capabilities that were available in 2D the advantages of playfields, sprites and copper lists you'd need far more CPU power.