GNU/Linux distribution with revertible package management. EDIT: I believe that my description is more accurate and if I am wrong I would like to be corrected.

GNU/Linux distribution with revertible package management. EDIT: I believe that my description is more accurate and if I am wrong I would like to be corrected. But I'd appreciate if you didn't downvote me simply because I use the term "GNU/Linux". I don't downvote you if you use the kernel's name for the entire OS. Thanks.