Well, I'm only doing this maybe once every two years or so. The seats and o-rings are lasting a long time, and a quick clean of the brass parts in an ultrasonic cleaner makes the regulator good as new.
It's true that a sealed regulator will have less performance degradation over time making the need to clean and adjust even less, but since it's probably a good idea to check up on things anyway at least with that kind of interval, I don't need to buy more time. (I'd be a little worried about salt water being trapped in the chamber as the Christolube squeezes out if used without service for much more than two years, maybe without ground, I don't know.)
I've actually wondered about that myself. I never got why they sealed their regs the way they do, I like the way Apeks seals with a little better I think. Nothing oozing out. That's one minus for Atomic, even if it really doesn't matter. When I took my Atomic service course I asked the guy about it. He said that it wouldn't dry up and that it actually makes the seal stronger. I'm not all that convinced.