Tom, welcome back.
There have been some significant advances in limb design and materials in recent years but the basic principles haven't changed and you can get a great vintage recurve or longbow for 10% of a new state-of-the-art custom, and the performance difference would be hard for most folks to notice. That being said, there are big differences from model to model, year to year and even individual bows of the same model. There is no unanimity of opinion because every archer has an opinion of what grip feels right, what length shoots best, which is quietest, which is fastest, which is the best value, etc.
I've bought, sold, traded or gave away over 20 used bows in the last year alone, not because I'm a collector, wealthy or finicky, but because I love vintage bows and like to see how different models shoot, for me, and I shoot every one of them on a regular basis until I decide to send it on to a new home. I've not regretted a single purchase and I really like it when somebody who got a bow from me sends me photos of their tight groups in the target or their hunting successes. Boys with toys!
I have shot recurves since the mid-60's and I've learned a lot about bows, but I know practically nothing about the history and details of particular brands and/or models compared to some of the folks on here and other trad boards, and the learning is almost as much fun as the shooting. But I have learned a lot about how to shop for and evaluate used bows offered for sale, and if you PM or email me about a particular bow or in general, I'll try to give you an informative reply.