I'm pretty sure the Amiga couldn't have run Zarch at anything like the smoothness that the Archimedes managed. And the difference was purely down to the stripp

I'm pretty sure the Amiga couldn't have run Zarch at anything like the smoothness that the Archimedes managed. And the difference was purely down to the stripped down Acorn RISC Machine chip running at 8 MHz, compared with the 8 MHz 68000 CISC chip. There are so many if-only's about the Amiga. If only it could have managed 640x480 un-interlaced, and if-only someone with even a modicum of taste had worked on the Workbench GUI. If only they'd used a decent disk drive, like Apple were forced to on the Mac. Commodore's pivot to selling to Business was doomed when selling a games machine, though the cost-pared A500 was very successful as a gaming computer in (non-UK) Europe.