@HaaTa
It depends on what you're trying to do with it. There is no one OS to rule them all, if you had to choose only one to do absolutely everything, the only one that has the potential is Windows. Though it's not best at everything, it can do everything.
I've never used Arch, it sounds interesting... but many interesting linux flavors come and go over the years because they're mostly pet projects that people tire of. For Linux I stick to the time tested and fully supported RHEL/CentOS. But that's for my uses, everyone is different. I've been burned too many times by linux servers that have unsupported software or the OS itself that is unsupported and since I'm not a programmer, I'm not delving into fixing code on my own. I also disagree with fixing it yourself IF it's in a business production environment. Example - You start a new job and everything seems fine at first, then you discover the previous admin has gone through and done custom this-and-thats to the code all over the place. That is unmanageable. On a few servers, sure, no prob but any sizeable environment that spells D I S A S T E R.
For home use or playing around, there are literally thousands of viable options. But for a business it comes down to Unix/Linux Enterprise OS's (which their stability and work is why the respun flavors are stable) or, drumroll please... Windows.
Try supporting a few hundred servers that are anything but Windows and you'll know what I mean.
Or, try having thousands of employees and several manufacturing sites relying on the stability of the solution you provide... then something breaks and time is ticking. Who do you want on the phone? I would want to be calling someone who is instantly available and who has the resources to support me until we are fixed. Only large companies like Microsoft or RedHat
If you're doing everything from a terminal (which I think you mean CLI, not terminal, a terminal could be running Windows
then you probably have no use for an HP multifunction printer, itunes or geekhack.
But I'm glad there are so many OS's out there. The competition and new perspectives each bring to the table benefit everyone.