Author of the post here. I would love to hear thoughts on folks experience using the different architectures and more pros and cons to each one. There was surprisingly not a lot of information comparing these different architectures that I could find and I would love to be able to update this post with more details.

besides Ray, are there other tools or platforms that embrace the agent actor architecture model?

Elixir is amazing, see also stuff like https://github.com/bitwalker/libcluster . I'm always surprised there's not more excitement generated by the possibility of having language-level features that would normally require all the weight of something like k8s. I don't get the impression that many people are seriously using it for data-engineering work though, which seems like a shame