What a pleasant surprise to see Microsoft open source this! I first saw the paper and a gloss of it or two last year. Virtualizing the actor space is a smart, smart, thing.
I am reminded of the article “The Profound Weakness of the .NET OSS Ecosystem”, by a developer frustrated by the lack of .NET alternatives to certain kinds of frameworks taken for granted in the Java ecosystem (Akka in particular). I wonder whether this would change his assessment of the landscape any?
For my part I think this is a step in the right direction for Microsoft’s standing in the open source developer community—one of many we’ve seen them take lately.