I think for some, myself included, the 220 Swift is just kind of one of those nostalgic varmint cartridges that will live on forever. Even though neither of these is from my era, a Pre 64 Model 70 220 Swift is kinda like a 57 Chevy, doubtful I've ever own either one, but I still think they're really cool.
My dad had a 220 Swift built off of a Pre 64 Model 70 30-06 that, his dad, my grandfather, bought new. As a kid growing up hearing all the near legendary stories of the 220 Swift, I naturally thought a Swift was the ultimate badazz gun and couldn't wait to get my little hands on the one my dad had. Unfortunately, some POS broke into his pickup back in the early 70's and stole it.
I'm kind of a self admitted brass snob, so for me, unless Lapua starts making 220 Swift brass, which is highly doubtful, it's pretty unlikely I'll even own a Swift, but I definitely think they're cool and I always like seeing old cartridges chambered in new guns.