I don't think 2 is especially compelling unless you've also bought into 5. For mutable objects, object identity is very important, and a default comparison tha

I don't think 2 is especially compelling unless you've also bought into 5. For mutable objects, object identity is very important, and a default comparison that obscures it is much less appealing. I'm not arguing against those two conclusions as a pair, just with the order in which the article presents them.