I've never quite understood these types of questions or outlooks, I'd rather label something as being such and such when it is realised it does fit into a category.
I guess by asking (or speculating) these types of questions you present a potential target for someone in a position to take the Amiga into that void? :-)
I've never used anything but an Amiga so I don't even consider my stuff classic or niche, since it is still the here and now for me, it's just the cpu I always use, end of story... If everyone wants to abandon me it makes no difference to me, I've got enough hardware to keep me happy till the day I die... And after I get a few more SAMs, well, anything could happen then, it makes no difference to me...
Like the good ol days of 1985 when there was no help or www etc...
And a 7mhz cpu ruled the planet ;-)