In terms of the evolution of cinematography, animation techniques, voice actors, music, special effects, CGI, writing, arc planning, general audience perception, and just about everything that matters in terms of evaluating a series... yes. J-Decker, Changeman, Gundam 0079, Saint Seiya, and pretty much every series you grew up loving as a kid now qualifies under varying levels of "old." Or retro. Or nostalgic. Or whatever you want to call it.
Sudden realization: why the hell am I trying to argue a semantics question with bigone?