I never configured anything on X with a DE, let it be KDE, Gnome or Cosmic, but configure everything with config files I can just copy on sway. It has nothing to do with X or Wayland, but the DE/WM you use.
How about "Let me selfhost my own repos, so other people working with my stuff can use IPv6, as well as be sure no large corporation known for being cancer stands behind it and monitors every thing I do."?
Mine was not really long and stretched out over multiple devices.
First Ubuntu Server, on my server, then a Kali dual boot on my main PC (which was actually useful), then PopOS. Then Ubuntu/Debian, after some time LFS and finally Arch on my old laptop. Then Arch on my PC too, and my new Laptops, and finally Arch on all devices.
Everyone who needs to use Mac or Windows due to work will very likely not have permissions to install anything anyway. And the lost souls using those "Operating Systems" out of free will ... well "some just need to be left behind. The family doesn't need to care for them anymore."
Because many graphical apps don't run natively on Android. They do on Linux.
eg. a full web browser, proper IDE or more powerful image manipulation program.