Comment by throwawayacct4q

I have built multi-cloud, totally cloud-agnostic deployments at my previous company with terraform, for really interesting reasons. At least for tf even if you are spinning up a VM and installing something like postgres on it (cloud agnostic, no managed services), rewriting is required because the order of operations can be different in infrastructure building, different modules, different vars, etc. You can use your code for one cloud as a template for the new one, but you do need to maintain a set of scripts for each cloud in my experience.