...there's no excuse for that given Apple's vertical-integration.
Of course, that extension model was hilariously insecure and wouldn't have worked in the modern era, but it had its perks.
The 68000 series CPUs didn't have an MMU built-in until the 68030, which I guess was far too late to see much use in consumer OSes. Pretty shocking that the jump to PPC wasn't enough for Apple to take care of that stuff, but I guess that was going to be Copland before it was canned. At least Amiga had preemptive multitasking from the beginning.
I never had experience with NT until Windows XP. Did play around with MS-DOS, PC-DOS, Win 3.x and 9x, OS/2 Warp, and early Slackware though. None of those were particularly user-friendly or stable, lol, especially by today's standards. At the extreme end, I've fried a motherboard (shorted it somehow on first boot) and melted a laptop (tried to install Linux on it, apparently didn't have the fan drivers or something). Then early 3Dfx cards were also a pain to get working reliably, especially with SLI.
It was just a rough time for everyone, lol. I think the only things from that era that actually worked well were my PalmPilot and Casio calculator watch :)