Different kind of rot. With nix and flakes, I can come back to a project 5 years later and as long as external dependencies (i.e. package sources) still available it will bring me back straight to that environment like it was yesterday.

If you have a Dockerfile from 5 years ago...well good luck building it today.

my point stands, it's still trying to lie about the meaning of the word rot. it's just as delusional as docker original "rotting software will run in 5yrs" argument... nothing there goes against rot

Good luck with your Docker containers in three years. (You're gonna need it.)