Hi iio7,

... and welcome!

I may not be the most qualified person to answer you, having run Obarun only for two months. But I'll try nonetheless. Other persons will correct me if I'm wrong.

What are specifically are the "changes", "modifications", and "additions"?

Had you read a few lines further of the same page, there is part of the answer to your question:

Systemd replacement is made by Skarnet's S6 supervision suite as init and by Obarun's own 66 service management. S6 and 66 is the heart of Obarun, it is what makes it unique and special from all other linux systems.

Basically, Obarun is Arch WITHOUT systemd as an init-system and with s6 and 66 instead, to init and manage services.

Does Obarun have its own package repository?

Same thing, the homepage of the site goes:

Obarun's packages and source reside in the streamlined [obcore], [obextra], [obcommunity], [observice], and [obmultilib] repositories. The official [core], [extra], and [community] repositories from Arch Linux are retained to fit the needs of the competent Linux user. This means you get Arch-Linux, AUR, and more, without systemd of course.
Additional Tools written in script language are available to simplify/help tasks like installing software from AUR, building packages in a safe environment, installing a particular system, creating a live version of your system, managing and modifying services, and so on.

There are specific Obarun repos for a few packages (the Obarun tools). But the aim is that after having installed Obarun (and you can even do that graphically from the live ISO), you get an almost vanilla Arch that lets you use pacman and install what you want from the Arch repos and the AUR.

If you want further reading and details, you may want to go and read this:

https://wiki.obarun.org/doku.php?id=overview
https://wiki.obarun.org/doku.php?id=pacman

And here is a nice resource by fungalnet (lots to read!):

https://sysdfree.wordpress.com/?s=obarun

Regards

How is Obarun managed? One project leader? Voting? Etc.

https://web.obarun.org/index.php?id=47
Actually we are three on the team. No vote here. If a member of the team is not agreed, the thing go to be discuss again as long as we don't found unity and equity.
If a subject bring important changes for user, it will be discussed with the obarun community instead of forcing everybody by default. We have mailing list. Everybody can ask for explanations of a choice, ask for features and so on, ...
We are a very small team and we don't have ressources (this is really a lack now because we have some idea for the future which need time and in this world time is money). All things that you find here are made by volontary users. We try to bring something new on the linux community (hoping is that the case)

I think too much attention is paid on someone who just read a few lines on the website and doesn't even indicate he tried to run or install Obarun. Too many trolls around to be wasting time on them.

fungalnet wroteI think too much attention is paid on someone who just read a few lines on the website and doesn't even indicate he tried to run or install Obarun. Too many trolls around to be wasting time on them.

Very good point, mate.

I can apologize in advance and don't mind being wrong and admitting it, but I tend to think that the minimal interest in a linux distro would be to see how it runs, live or installed, and then make some remarks. I didn't see this being an interest in your introductory message so my assumption was based on the question "why would you want to know?"

It is linux. It is based on arch, as much as possible. It doesn't have systemd, but s6/66 instead. To be able to live without systemd some packages have to be modified due to their direct dependencies. Some are replaced by other packages (like consolekit and eudev). And some are condemned to never run with obarun, like gnome-desktop. For a long while this was the only ready distribution with s6 being an integral part of it. Now there are few more but really in their infancy stage of implementing it. So, not just another distribution like the rest of the hundreds, but really unique.

Try it!