This is my first post and I hope is a useful one.
For those new to Linux, you may heard about Debian voting on the init system, if you haven't, good for you, you may skip the rest, have a nice day :) .
If you already know what systemd is, you can also can skip the rest and have a nice day too.
How am I doing so far? I already lost 80% of the readers.
I think this post is for the rest of you, you just got your first install or have been blissfuly unaware of all this init system debacle.
TLDR: the whole thing doesn't matter until it does and that will probably be never, so stay blissfuly ignorant of the matter.
For the last 1% of the readers, good for you. Those who are interested in the inner workings of the system have a wonderful journey ahead of you, but beware, there are some unworthy battles out there and I'm afraid this is one of those. These init system discussion lost it's technical value long ago and now is almost a religious one. If you want to learn something about it, avoid all things "Vs" or "best" or "comparisons", just go to the individual descriptions and technical inner workings.
The Linux community can be a wonderfully passionated bunch and as such, can be vicious sometimes, we have to take the bad with the good I guess. So my advice is, don't get involved, these discussion at this point has very little nutritional value.
Have a nice day.