> Which versions of linux cleanly update? Most of them, these days. > What do I do with an old Centos 7 system? Compare apples to oranges, since CentOS was d

> Which versions of linux cleanly update? Most of them, these days. > What do I do with an old Centos 7 system? Compare apples to oranges, since CentOS was discontinued, and then move forward anyways because https://almalinux.org/elevate/ https://almalinux.org/elevate/ has you covered.