It's not a blog post, it's an RFD. We have a strong focus on writing as part of thinking and making decisions, and when we can, we like to publish our decision making documents in the spirit of open source. This is not a defence of our position so much as a record of the process through which we arrived at it. This is true of our other RFDs as well, which you can see on the site there.

> It also should not matter to their customers. They get exposed APIs and don't have to care about the implementation details.

Yes, the whole product is definitely designed that way intentionally. Customers get abstracted control of compute and storage resources through cloud style APIs. From their perspective it's a cloud appliance. It's only from our perspective as the people building it that it's a UNIX system.