I have a pair of boots that fit me like no other boot ever has. I spent much time, money, and effort on them until I got them right. I hope to keep using the shells for many more years. I will not give them up easily and I've been very protective of the soles to keep them from becoming too worn to use.
Today I had some new skis mounted and, of course, I took one of my boots to use in the mounting process. While the skis and boots were still there, I got a call from the shop and the guy told me that the bottom of my boot heel was worn almost to the point that it would be detrimental to the working of the binding (Salomon 912 TI) so much so that he wondered if I didn't want to consider a new boot before mounting. I told him no, and to go ahead and mount them with my old boots. When I got to the shop they told me the same thing, that the heel on the boot was worn so that it might interfere with the working of the binding and that they were unsure if they should have mounted it, so not to blame them for any problems I might have.
This raised my level of concern, so when I got home I put my boot in the binding and took a look to see what they were talking about. What I saw was that the binding does not in any way contact the part of the boot heel with wear. That part of the boot is suspended far from any binding part and there is no way that it could touch any part of the binding even if it wasn't worn down.
So my question is, am I missing something and there really is a problem, or were they just trying to scam me into buying a new pair of boots?