It’s easy to change display manager (except the case of keeping multiple of them to test out, if they are big and complex, like Gnome and KDE - there are conflicts).
Some distros may have worse support for specific display managers, but I cannot say as my experience was relatively smooth for Debian, Manjaro, Arch, Endeavour and Artix. In Ubuntu I had some issues, but I could live with them for a time being because I couldn’t change the workplace OS.
But for init system it’s usually PITA. Many packages, including critical for system operation may have dependency on systemd, for example.
In case of Artix Linux there are separate versions of packages for each init system that’s supported, if package has dependency on the init system.
It’s easy to change display manager (except the case of keeping multiple of them to test out, if they are big and complex, like Gnome and KDE - there are conflicts). Some distros may have worse support for specific display managers, but I cannot say as my experience was relatively smooth for Debian, Manjaro, Arch, Endeavour and Artix. In Ubuntu I had some issues, but I could live with them for a time being because I couldn’t change the workplace OS.
But for init system it’s usually PITA. Many packages, including critical for system operation may have dependency on systemd, for example. In case of Artix Linux there are separate versions of packages for each init system that’s supported, if package has dependency on the init system.