Haven’t tried pulumi myself. But some questions to consider:
1. Do you want to go multicloud one day? Then pulumi or terraform.
2. SST is best with lambdas imo cuz of that fast feedback. I don’t think SST can proxy requests from fargate/ecs like it does for lambdas yet.
3. Letting the true owners own their “stack” helps a lot, but pulumi is an even newer tool. So this may be the biggest red flag. If one or two of your devop engineers leave, will it be maintainable still?