Originally posted by K-9 True, but if you didn't expose it right, process it right, or store it right, your slides would look faded from Day 1.
Treat any film the way you describe and it's going to have some sort of image deficiencies, most much faster than Kodachrome would under similar handling. Poorly exposed, processed or stored E-6 is pretty ugly too, and older Ektachrome films have some pretty horrific problems with dye fading.
Kodachrome always had the advantage of being exclusively in house Kodak processing, at least until the Q-Labs came along.
Ektachrome slide processing is a hodgepodge of independent labs, some good, some bad, but most not really scrutinized by Kodak, or anyone else for that matter.
Your point is moot, sorry.