Ok, I found one of our repos has a GHA version that doesn't do any gymnastics. Unfortunately, it's one of our private repos, so I apologize for the wall of incoming code!
We also adopted Pulumi for all of our projects and are using GitHub Actions as a CI/CD platform. I'm talking about some 30 repositories ranging from simple ones to those needing a little bit more orchestration (e.g. creating Lambda deployment packages, multiarch Docker image builds or interleaving Pulumi provisioning with building applications on the runner). So far we haven't encountered anything that wouldn't be solved and are more than happy.
No matter how you like to participate in developer communities, Pulumi wants to meet you there. If you want to meet other Pulumi users to share use-cases and best practices, contribute code or documentation, see us at an event, or just tell a story about something cool you did with Pulumi, you are part of our community.