This can be managed in many ways, like identity immutability, package redirection, and solved from a UI standpoint like "a/foo was moved to b/foo" on your user's next package update because the package manager has first-class support for it.

Did you think nothing can be improved upon Java?

Meh, nobody cares about package names, anyway. I've seen plenty of companies who had com.acquisition1, com.acquisition2, etc., all over the place.

The Java space, Maven, more precisely, did come up with the first namespaces package repository. For some reason other package managers don't do it, for simplicity I guess, and it always come back to bite them in the butt.

For reference, Maven 1 didn't have groupIds, Maven 2 added them. They did it for a reason and that was back in 2005!

I think there's middle ground. Github manages somehow (by creating redirects).

I'm having the exact problem you're describing in a macOS app, where an app that was previously name.janedoe.app is now org.company.app. What a mess that caused.