Tilt: dev environment as code

I did a blog post for Linkerd showing some of the benefits of using Tilt https://linkerd.io/2024/12/02/tilt-linkerd-nginx-part-1/.

TL;DR you can run some of your infra in local-dev that provide parity with your production environment.

I'm using Pulumi for this right now (with a dev setup and a prod setup), what would be the benefit for me to use Tilt over this?

Tilt is useful for local-dev where you are going to be modifying code / k8s configs and want live reload when you make changes. That is almost the entire appeal.