Crap works in the sense that any amount will turn you off. It may be disgusting, but we are trying to prove that even the smallest amount of change to the OT is a turn off. So you need to appeal using a comparison in which even a tiny amount will turn you off.

However, if you want to make a comparison using incremental changes to show how much more distasteful something can be, then the salt analogy works better. Look at the changes GL made for the SE. Now even more changes for the 2004 release. Finally, another set of changes for the 2007 UE. As each happens, he is adding progressively more salt to the recipe and making it even nastier tasting with each round of changes.