While the author did not get much feedback from the kernel list when he mentioned the project there, it has still been getting developed and it works nicely for at least a few people who are using it (including myself). The author does plan on submitting for inclusion in the kernel in the not too distant future and hopefully that will result in more feedback and it ultimately being included.
I have no problem building it for each kernel update. Someone made a copr for it, but they don't seem to be updating for rawhide kernels. The project's home page is at wireguard.io.
It is a lot easier to figure out than IPSEC. With git, if multiple governments commit backdoors we'll at least be able to see the commits, unlike Juniper whose change control is so bad they can't (or won't) tell who added backdoors to their code.
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