Blondie (the comic strip and not the rock band) is now 82. Even though creator Chic Young died years ago, his son Dean keeps the strip going with artists working close to Chic Young's style. And why not? The strip has been successful through the Great Depression, World War II, the Cold War...and right on up until now, in its own ageless world. You look at the modern Blondie and there just isn't much different from these Sunday strips of 70-plus years ago, taken from Feature Book #29, a reprint from 1941.
I believe with newspapers being replaced gradually by electronic media in a few years the comic strip as we know it may just disappear from print. But I'm guessing that no matter what form it appears in, you'll probably still see Blondie.