I have a vague recollection of a feature like

terraform plan

being discussed and possibly even released, but I can't find it here or on the blogs - is that something that happened in my head?

Is it Update Plans? https://www.pulumi.com/docs/concepts/update-plans/

Awesome thanks

I’m not familiar with the roadmap for this feature, and don’t see it here: https://github.com/orgs/pulumi/projects/44/views/4?filterQuery=plan — does anyone know if Update plans has a GA path?

It's already GA, you just need to turn it on via an env var.

Hmm, I guess I’d like to know whether it’s an actively supported beta, or when it’s going to be considered stable enough to not be behind a feature flag?

It's totally stable. When the feature flag is removed from it, I have no idea.. ¯\_(ツ)_/¯

I've asked internally -- will report back soon as I hear (or someone else pops in to answer!)

Thanks both!