Datadog allows you to export all of this but I don't see how that's any useful. You can't really port Datadog dashboard to let's say Grafana easily. The query languages they use do not have 1:1 mapping, the way dashboards are organized and the different visualization tools you get are not same either
they surely doesn't help with the "migration" (application layer) part but they help you manage things with code, which is better than nothing (you can do some heavy-lifting to make it work in another provider afterwards)
that's the reason terraform is not really a solution for what I speak about in the blog post.
