Yes, you read that correctly. We have just released an Application Insights chart widget for VSTS dashboards!
It's ok, you can go ahead and say it, this has been a long time coming. We heard all of the fans from our previous metric widget very clearly that this was something almost everyone wanted. But for quite awhile we also had other, even-higher-priority things that our user base really wanted and needed (you know, little things like bringing the product to general availability, and developing the whole Usage Analytics functionality area). The good news is that we never forgot about all of the asks for this feature set and it's finally here.