Systemd vs sysvinit

What are the advantages/disadvantages of using systemd versus sysvinit?

In brief:

systemd

• Fast boot time, mainly achieved due to starting services in parallell. This can also be achieved with SystemV init, but has to be done manually, while it is a product of dependency handling on systemd.
• Automatic dependency handling.
• Monitoring of started services with the ability to restart crashed services.
• Modules written in compiled languages, probably hard to debug.
• Tries to replace several system services, from the actual init over hardware recognition and session management to the logging service, and many more. Not the Unix way.
• https://wiki.archlinux.org/index.php/Systemd
• http://freedesktop.org/wiki/Software/systemd

SystemV

• Boot time depends on the admins optimizations.
• Due to its static dependency handling relies on a knowledgeable admin. Decide for yourself if you count that as advantage or not.
• Needs often some hacks to monitor services, services can easily escape the monitoring.
• Written as Shell scripts, so easy to debug and alter if necessary.
• Minimal approach, doesn't try to be the one super-service running the system.
• https://wiki.archlinux.org/index.php/SysVinit_%28Italiano%29