So, what harshness have you subjected your bike to that you feel necessitated the frame saver? Where is your bike stored now and in what condition is it?

Actually I think you misunderstood my point. For a steel bike to rust from the inside out would require an extreme level of abuse that I think would be unlikely for anyone on this site to subject their bike to. I've got a 40yo steel frame that's gone through a lot of rough use including 20 years in an outside shed. I ride it regularly now and have no worries about it's integrity.

With all that said, I did buy a Trucker Deluxe Frame that I sprayed with Frame Saver. I did so because I figured it would be a good selling point should I decide to sell it in the future. I would not have done it otherwise.