We’ve had a lot of pain with celery and Redis over the years and Hatchet seems to be a pretty compelling alternative. I’d want to see the codebase stabilize a bit before seriously considering it though. And frankly I don’t see a viable path to real commercialization for them so I’d only consider it if everything you needed really was MIT licensed.
Windmill is super interesting but I view it as the next evolution of something like Zapier. Having a large corpus of templates and integrations is the power of that type of product. I understand that under the hood it is a similar paradigm, but the market positioning is rightfully night and day. And I also do see a path to real commercialization of the Windmill product because of the above.