And I think the package manager can do so much more here than current ones from a UX level. For example, instead of having to push updates to both packages, yo

And I think the package manager can do so much more here than current ones from a UX level. For example, instead of having to push updates to both packages, you push updates to the new one and, because you've annotated the old one with the move, users have a somewhat seamless experience when they run their update: they'll get a little heads up about the move, explain that oldpackage eol'd at 5.4 and newpackage picked up at 6.0, and would you like me auto-update your manifest? And/or the package manager supports a rename flow that does this for you.