There are Evergreen browsers like FireFox, Google Chrome, and Microsoft Edge that always keep themselves up to date with their latest versions. Are there any Evergreen Linux distributions that always keeps themselves up to date automatically so that one wouldn't need to update the system or any of its packages manually?
If any exist, how do they deal with package versioning? In particular, do they utilize semantic versioning for packages, like could you specify a version constraint like
~> 2.2.3 for the system's Ruby version?
If none exist, is it a matter of technical challenges that prevent one from existing or is it due to a lack of demand?