Recently I asked my server administrator (large educational organization with many accounts for various sub groups).
I pointed out that it might be a while before MM3 is on CPanel. I showed him the documentation at http://docs.list.org/en/latest/migration.html to show how to go from Mailman 2 to 3 manually. He said he might be willing to give it a whirl.
He said he might be willing to make our group (GALE) a test case (we have about 60 people in two not-so-active lists). He asked:
"I'd need to look into this a bit more to see what's possible. One issue is whether CPanel updates would overwrite any changes made. If you have any more details about it, let me know. We could try it out on the GALE site if you wanted, but I couldn't guarantee that it would work."
I take it he can migrate from MM2 following the directions above in the URL. I guess what he means is, once it becomes available in Channel, would it mean more work to get it to work and to update than if we waited for the CPanel version to debut. Since I don't understand much of the install stuff, he would presumably be doing it.
Thanks for anything I could relay to him.
Paul