My friend has to get hers replaced, so I'd been thinking about this. I posed the question on Facebook. I would have guessed that most people didn't still have theirs but at least three quarters of the people who answered my (obviously unscientific) poll do. Really, how did they keep track all these years & decades? One little scrap of paper that could so easily be lost, stolen (with the wallet it's in), destroyed. How did so many of us who could barely keep track of our names manage to hang on to it? The government told us to & we did. That's a little depressing.
It turned out to be a great question though, because it applies to everyone & everyone (for the most part) knows the answer. A lot of people were surprised to still have theirs. Many had a parent or grandparent's card too.
Even though I had no expectation that Social Security would have any bearing on my life, I kept that dang card & there it is in a wallet, with my old address from Sioux Falls & my old signature. Where was it throughout the 70s that I have it now? I don't suppose I'll ever know.