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AmigaDOS was developed on SunOS Workstations that were modified.

I don't think the Zorro bus was as good as ISA or PCI and the A600 was like you said it was. The Amiga needed a networking adapter to work with networks and Apple Macs later had them as default or via a NuBus slot.

Plus most of the software for the Amiga was video games which limited the system to video games it needed more business software.

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Zorro-2 was superior to ISA in pretty much all ways that count. It had auto configuration and just worked in general.

PCI is vastly superior to Zorro-3 though, in both features and performance. Z3 never achieved the performance given in the specs and had quite some problems. IIRC Dave Haynie said that he would have used PCI instead of developing Z3 if it had been out at the time.

There's no need to "think" about it. Even old 16-bit Zorro had DMA and plug-and-play, which actually worked. ISA was a shit-show and often 8-bit wide, too. All PCs at the time needed networking adapter for Ethernet and the Mac network was dog slow. (I won't go into the software side, I don't have time right now.)

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