More or less. It’s the only distro with quite a few options for init out of the box. Runit, s6, OpenRC, dinit. No sysV. Their implementation of runit in particular is far better than Devuan, who simply wrapped runit as a service wrapper around sysV.
They have had to do quite a few work around a to get the different init systems working imho, and i see why the guys over at Debian roughly a decade back had such a lengthy email discussion about not wanting to support all the inits.
I’m super grateful to the guys over there doing the hard work, but it obviously wouldn’t be possible without the upstream Arch team. Runit is awesome though, imho.