On a similar but slightly different topic, I've long wondered why someone hasn't created a "Universal Terraform Provider" that can work across the major cloud services. Resources such as "instance" and network are pretty general, an while there would definitely be gotchas, it would probably be helpful in the same way that cross platform GUI frameworks have seen a rise in popularity.

https://github.com/multycloud/multy

But a multicloud wrapper creates a lot of abstractions.