People still ride stuff from the 60's and 70's. And some of those are just boat anchors.

If you are wanting to start riding again, it's as good as any bike for you to ride. If you get really enthusiastic and ride so much that you get very cycling fit so to speak, then you might find some things about the bike that seem to hold you back a little.

The technology today has give some gains from back then. But if you aren't riding at a high level, then the gains might seem pointless.