I suppose the better question is
Would these bikes still be considered as good if Miyata were producing bikes to this day? What is the nostalgia / legend cache worth? I have only ridden one Miyata, a lower-end 310 I believe, and I liked it. But what I really liked is how protective / informative their owners are of and about them.
If Miyata were producing nothing but crabon and aluminum boring-mobiles like most of the main manufacturers are today, would we still care?
(I have this debate with myself often concerning other C&V things too, kind of the burn out vs. rust adage)