> Amiga was only better 1985-1988. By 1987 PC and Mac caught up and never looked back.
Oh indubitably! I don't think even the most committed Amiga fan, even the ones that speculate about alternate histories, would deny that at all.
The thing is, though, that only happened because Commodore essentially decided that since it had so much of a head start, it could just rest on its laurels and not really innovate or improve anything substantially, instead of constantly pushing forward like all of its competitors would do, and so eventually the linear or even exponential curve of other hardware manufacturers' improvements outpaced its essentially flat improvement curve. So it doesn't seem like IBM PCs and eventually even Macs outpacing the power of Amiga Hardware was inevitable or inherent from the start.
If they had instead continued to push their lead — actually stuck with the advanced Amiga chips that they were working on before it was canceled and replaced with ECS for instance — I certainly see the possibility of them keeping up with other hardware, and eventually transitioning to 3D acceleration chips instead of 2D acceleration chips when that happened in the console world, eventually perhaps even leading to the Amiga line being the first workstation line to have the gpus, and further cementing their lead, while maintaining everything that made Amiga great.
Speculating even further, as we are seeing currently with the Apple M-series having a computer architecture that is composed of a ton of custom made special purpose chips is actually an extremely effective way of doing things; what if Amiga still existed in this day and age and had a head start in that direction, a platform with a history of being extremely open and well documented and extensible being the first to do this kind of architecture, instead of it being Apple?
Of course there may have been fundamental technical flaws with the Amiga approach that made it unable to keep up with other hardware even if Commodore had had the will; I have seen some decent arguments to that effect, namely that since it was using custom vendor-specific hardware instead of commodity hardware that was used by everyone, they couldn't take advantage of the cross-vendor compatibility like IBM PCs, could and also couldn't take advantage of economies of scale like Intel could, but who knows!