I disagree. As a developer I think breaking literally decades old workflows for users without notice or any level of concern is a bad thing. For a program with users so reliant on muscle memory, I think the impact is far worse.
If I understood this correctly, the new behavior cannot be customized back to the old behavior. If that's true, then that's obviously very bad. Generally, as an Emacs user, I don't just want an opt-in or a gentle transition, I need to be able to customize everything to my needs.
