An iPhone can communicate with other devices over open protocols, which is different from the proposed un-reachability and privileged access to the network.

Elites abandoning a world they judged unworthy in favor of vendor lock-in sounds pretty dark to me

without installing another distro over the top of it … [replace] package managers

The package manager is the distro, though.

$ pacman -S apk-tools
$ apk add alpine-base linux-lts

Then kexec to alpine’s kernel and the initramfs generated by its installation (which would incidentally “replace” PID 1 with the new /sbin/init). For clean up you could take a diff of “tar -t” for all the installed packages from both distros then delete the files only in the old distro’s packages.

Make a self-compiled distro your target.

Replace the first step with a compilation of apk, abuild everything required by alpine-base and linux-lts (git clone aports to bootstrap that work), then add the package directory to /etc/apk/repositories before the second step. Next, begin to worry that you haven’t fully broken free yet, replace abuild with a bespoke mybuild and apk with tar -x, grapple with signed binaries, reflect on your own identity and authenticity, then take a tour through gentoo and find yourself missing the $HOME you left and its familiar comforts.