Pulumi isn't "built on terraform", that's a common misconception. See here: https://www.leebriggs.co.uk/blog/2021/11/06/pulumi-faqs.html
Do you think it changes anything about how I've characterized it above?
> Pulumi doesn’t “use” Terraform under the hood at all, it uses Terraform providers in order to map the cloud provider API surface.
Which is a real devious piece of sophistry.