I think you are mostly right, I just think your timing is off. Those early 386 machines and Mac II systems were very expensive, at least 2 to 3x the cost of an Amiga. The average home user wasn't going to drop $8K on a PS/2 model 80 with a 386/16.
By the early 90's the Amiga just wasn't competitive. The chip set barely evolved since 1985. ECS barely added anything over the original chip set. By around 1992 or 1993, 386 systems with SVGA and Soundblaster cards were cheap. Amiga AGA was too little, too late. Also consider the low end AGA system (Amiga 1200) was totally crippled with only 2 megs of slow "chip" RAM.
I was an Amiga fan until 1993. Started with an A500, then A3000. Eventually I moved on to a 486 clone w/Linux. Later on I had a Sun SparcStation 10 at home, so I agree with you on Sun and SGI.
By the early 90's the Amiga just wasn't competitive. The chip set barely evolved since 1985. ECS barely added anything over the original chip set. By around 1992 or 1993, 386 systems with SVGA and Soundblaster cards were cheap. Amiga AGA was too little, too late. Also consider the low end AGA system (Amiga 1200) was totally crippled with only 2 megs of slow "chip" RAM.
I was an Amiga fan until 1993. Started with an A500, then A3000. Eventually I moved on to a 486 clone w/Linux. Later on I had a Sun SparcStation 10 at home, so I agree with you on Sun and SGI.