Wow, I didn't know people were actually using the view counter ^_^. As a lot of pages are being served from cache instead of dynamically generating them every single visit, a view counter would never be accurate. Or our entire cache would be rendered useless, because it would only be valid for a single pageview.
At the moment we don't use the cache properly yet, so pages are quite dynamic. That's something I want to change tho.
But snout's explanation is correct, it would make any caching useless.
Maybe we'll implement this somewhere this year. But it would have quite some impact and might possibly slow down the site. Not something we'd want.