Requirements (4/4)

Other design issues
Used /etc/rc.d instead of /etc/init.d
System isn't exactly SYSV, different name highlights this
A symlink from /etc/init.d to rc.d can provide compatibility
Originally supported three schemes; /etc/rc, SYSV style /etc/rcN.d, and /etc/rc.d
Multiple systems is a support and maintenance nightmare
Lack of dynamic dependency ordering in the first two schemes
This decision was contentious
"Nochangeniks" are a very vocal minority and the most skilled to privately maintain their preferred mechanism 
Those who want SYSV init.d can trivially add to rc.d