Compare this to how Ubuntu f*cked us all with 10.04 & upstart
I upgraded my Debian system to Jessie and it is working well with systemd in sysvinit-compatible mode.
After what happened with how Ubuntu surprised everyone by going all-Upstart in their 10.04 debacle (Upstart is still not a good idea for a production server), I was expecting the worst. However, it is doing very well so far.