Also it’s now old tech for them - pushing it to the public domain allows the public to maintain it and improve it for free; not to mention having more people us

Also it’s now old tech for them - pushing it to the public domain allows the public to maintain it and improve it for free; not to mention having more people use their system is like free training before they hire the person. However, pushing it out surely does enhance the public knowledge - in the same way that Carmack released his 3d engines that were out dated in industry by one gen but still helped the public. Lastly - they need to push it out as they need to attract top talent, and need to demonstrate they have top tech there (and are willing to let their researchers claim credit for it once it becomes old enough).