Title makes it sound like you won't be able to run KDE Plasma on *BSD or minimal/obscure Linux distros, so I feel like it's worth quoting the bottom of the post for completeness sake:

> To avoid any confusion, it’s important to emphasize that the lack of PLM support on systemd-free Linux distributions or BSD systems does not mean you can’t use the KDE Plasma desktop environment there. Plasma itself remains fully usable on those platforms.

> In other words, for those users, the situation remains unchanged. On their systems, Plasma will continue to rely on SDDM or other platform-specific startup mechanisms, with no indication from KDE that PLM will be made portable beyond systemd environments.