62" is pretty dang small when you actually look at a bag that size.

I ride my S&S bike every day -- it is my commuter/city bike as well as my touring/travel bike (S&S couplers are expensive and it feels wasteful to just have an S&S bike sit in the garage most of the year). I fly with it as checked baggage in the S&S semi-hard backpack travel case. It's exactly 62", and comes close to the 50lbs weight limit a lot of airlines impose, depending on what else I pack in the case with the bike.

I'm not really worried about someone decoupling the frame to steal it, since:
a.) I use the "Sheldon Method" of locking the rear wheel to the rack inside of the rear triangle, so if someone was able to decouple the frame, they'd have an essentially useless front half of the bike. Of course, all of this leaves the components vulnerable to theft, but this is no different than a standard bike frame locked in this method, and I take appropriate measures to prevent component theft on all my city bikes.
b.) Without the S&S wrench, the frame couplers are SUPER hard to take apart. I suppose with a similar spanner, like a fixed gear lockring spanner, or certainly a pipe wrench, the bike could be decoupled without the S&S wrench, but I doubt many bike thieves carry those tools, and besides, see "a.)".

So in other words, if you an afford a travel bike, and you really do intend to actually travel with it (the cost differential is typically paid off in several trips with the travel bike compared to paying the 50-200 dollars per trip for oversize bike boxes), I wouldn't be too worried about using it every day.

Oh, and for reference, my S&S bike is a Surly Trucker Deluxe. The Surly S&S frames are probably the best deal for a travel frame out there.