Hell yes for me, even though I'm at a point where I probably could afford a modest retirement even before becoming eligible for SS. As the end quote of that article says: "I don't know that I will ever want to retire, unless my health dictates that I must," said Sekula. "I love what I do." And I love being productive.
You do know why 65 was picked as the official retirement age, back when SS first started (and Bismark's plan in Germany, well before that)? It's because most people weren't supposed to live much past 65 anyway, so the system would never have to pay out much in benefits. Today is a different story: there's a fairly sizeable segment of the public who've taken care of their health, exercised, and are as vigorous as people a couple of decades younger were a generation or two ago.