The purpose of the normalization package is to help you work with text under these constraints. I can't imagine many situations where strings.Replace would be sufficient for reliably manipulating natural language. The cafe example is to demonstrate the why you might need the package.
I wasn't thinking that I'd really want to pluralize text like this, but maybe you'd want to turn people's names into links in HTML source or something. If someone's name ends with an accent, and if the unicode isn't normalized, strange things are bound to happen. The blog post is great at pointing this out, and it sounds like people are working on a go.text/search package to help, so that's good. I'm not saying Go is broken, just that this kind of stuff can be really surprising.
