Linux

If there are, none have managed to make a strong case for themselves yet. Systemd has proven itself to be a huge boon for sysadmins, especially at scale. These kind of anti-systemd efforts usually come from stubborn old timers who probably aren't even employed in a capacity where they'd have to work with an init system at all (maybe they were fired for having obsolete skills?).

Yes I'm being a dick, but these people are also usually dicks, so fuck em.