We do support it, you can set overflow-scroll="true" on a content area to use it(http://ionicframework.com/docs/angularjs/views/content/)

But -webkit-overflow-scrolling: touch has some limitations. For one, you don't receive scroll events after a flick when the finger has left the screen. There are also some very strange issues in the mobile browsers with it, it's a buggy solution right now.

In order to build some of the more interesting UI things like pull to refresh, and then list virtualization (i.e. only rendering the active subset), it made sense to have more control over the scrolling operation.

But that was a decision I made a few weeks back so I might be wrong, and I would love to use the browser scrolling if possible.