Ahead of its time, it was unjustly rejected and persecuted by the ignorant masses. Its advocates are bonded by the quiet pride that at least they weren't unthinkingly siding with those masses. (And they're right!) Meanwhile, as the Amiga stagnated for terribly unfair reasons, other, scrappier technologies like the i386 and UMG-Si grew from being worthless boondoggles (except in special circumstances, like spaceflight) to being actually far better and cheaper. But the Amiga advocates keep the faith, sharing their suffering and resentment. They inevitably try the alternatives a little and perhaps even start to like them. Gradually their denial recedes, decade by decade.
But they know that however much fab costs go down and leave their beloved Amiga behind in the dust, you'll never be able to run nuclear submarines and Antarctic research stations on solar panels.
You say, "Solar and wind are going to undercut that cost very soon." But the truth is that wind, where available, undercut the cost of steam power (including nuclear and coal) a decade ago, and PV undercut it in equatorial parts of the world about four years ago, or even more of the world if you don't include storage.