NixOS and Darwin - Partial success
Yesterday I experimented with NixOS and Debian. I managed to install NixOS on the Pi4 and I managed to implement several changes to the configuration.nix file before the Pi started to overheat and become much slower. At this point I tried to run Debian and that worked.
At first Debian was running in command line mode so I took the time to install the KDE desktop and that’s when I ran into the same limitation of the Pi4.