Discussion: Why stick to .page extension

I'm wondering what is the benefit of using the `.page`-file-extension in combination with the header

``` .yaml

---
format : whatever

---
```

Isn't it simpler to choose the reader based on the file-extension (`.md, .org, .html, .tex, .rst, ...`)? Links then still look the same; but `gitit` has to look for the first occurrence of the `basename` of the file. For example

```
Here comes the [link](blah).
```

with `blah.md` to find.