And still there is a lot of music that was made in the 60s and 70s that is still to be discovered, and thanks to YouTube and other Internet sites, it’s all out there now.
That's true. And even earlier. Only a few months ago I finally got around to buying a couple of Link Wray CDs, after seeing a video of Jimmy Page talking about the influence of Wray on his music ("Rumble" in particular).