Fuchsia is not an answer to this question. It's exactly the same as Android. Android is technically open source as well. Also, Fuchsia will never be an distrib

Fuchsia is not an answer to this question. It's exactly the same as Android. Android is technically open source as well. Also, Fuchsia will never be an distribution or branded OS on it's own. It might replace the Linux kernel is some bigger operating systems. Could replace Linux in android or chrome but I doubt it'll be fully new standalone OS.