I’m happy for you that this is the first time in seven years that you’ve had to fall back to to this, but:
I’m going to call that out as a mischaracterization. CDCK do actually recommend backups before updates as a best practice. I’ve seen many times here on meta the note that if the GUI update fails, fall back to rebuilding from the command line, as part of normal expectations for administering your own forum. They did not break forums with no rollback so your implication is false.
I’m not going to sit here arguing for hours. I just think you aren’t being completely reasonable here.