I believe that getting a replacement can method to work absolutely correctly in all situations is far harder than it looks. I tried to explain some (not all!) of the issues in my root node. If you think that it is easier than I do, then post an interesting example of an AUTOLOAD and how you'd override can, and I'll try to demonstrate how - by your standards - your code is incomplete.
If the task proves difficult for you, right after you just read a description of some of the things that can go wrong, can we both agree that expecting people to consistently get it right is unrealistic?
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