dashing is a pretty stable product. Its like a simple framework you can customise anything you need in it. We used it in our team to serve alarm metrics till it was deprecated in favour of Grafana.

Grafana is a push model, while Dashing is a pull model.

Grafana is pretty tough on RAM and svg usage. Try to use pngs and the UI is harder to adopt.

IMO it doesn't need updates. It's stable has tons of widgets and works out of the box. Loving it even though I have never touched ruby before.

In combination with graphite I can make some cool statistics and graphs

Yeah, we use Dashing, and very stable/nice/easy to extend. Sad that it's no longer maintained, but pretty good nonetheless.