They say in the future, and only partially: https://docs.radixdlt.com/alpha/learn/faq#is-radix-open-sour... For me is a STOP signal.

It's going to be fully open-source, with Tempo (consensus) going open source last. The constraint machine (https://docs.radixdlt.com/alpha/learn/architecture/constrain...) going open-source before launch.