I, for one, would be quite sad to see Linux on Github. An open source alternative, and preferably one without the political baggage and MS-backing of Github, would be a better fit.
There's a separate discussion about whether the workflow more broadly should move out of the LKML. This might look like having patch sets posted to the LKML automatically ingested into Gerrit.
All of this seems pretty sane to modernize the workflow & make it a more familiar one for those working on the Linux kernel professionally. E-mailing patch sets around is decidedly a very old way to do code review that's not generally found in modern professional shops (cries of "this is for the worse" notwithstanding because that feels like a VIM vs emacs complaint).
Also, Linux is already mirrored to GH https://GitHub.com/torvalds/Linux
I suppose they made this change because Microsoft still hosts the Linux kernel for free on their platform and that's probably the main mirror people clone it from. Still, making proprietary patchwork for such an opinionated open source project seems a little silly to me.
I very much doubt this is true.
Just pointing out it's already 'on GitHub' as much as it will be.