I assume this will work fine for a server system, but will it work on a desktop system using GNOME? From what I've read, GNOME has several systemd dependencies, but it's not clear to me whether this requires systemd to be used as init, or merely that systemd's packages must be installed.
Also, the future of sysvinit in Debian is not clear. I've done some research and one particular Debian developer claims that there is no plan to support sysvinit as of Stretch, declaring that systemd is the only option as of Stretch [1]. However, a different source [2] indicates that there are several developers maintaining sysvinit currently.