For stainless steel to conduct heat, it has an aluminum or copper plate glued to the bottom. Some BIFL brands like All-Clad and some (now harder to find) lines of Calphalon use tri-ply construction where the conductor metal is pressed between the two sheets of steel like a quarter. But aluminum and copper are not dishwasher safe, and the glue used to fuse the plates to the other pan's bottoms will eventually degrade in the dishwasher.

Not that I disagree with anything you said, you seem to know your stuff! It may say dishwasher safe, but it will definitely shorten its lifespan. To get the residue off of my Teflon pans, I've found pouring white vinegar in them and letting that soak overnight usually removes the residues and brings the nonstick quality back.