>>801419
>How easy is it to install
No harder than Linux, depends on the Illumos equivalent of 'distro'.
>what level of experience does the user need to install maintain and run it
About what it takes to manage CentOS. It's not Ubuntu, but it's not Gentoo either in 'difficulty.' The paradigms differ a bit (/dev population, network management commands, non-GNU userland utilities having different switches than GNU ones, etc).
>How good is the hardware compatibility and support
This one is the rawest part of the deal. You will be selecting hardware from the Illumos HCL, unless you're bored and porting NetBSD drivers to Illumos sounds like a fun game to pass time with. If this is an argument to not bother, then try to imagine Linux hardware compatibility 15 years ago at the height of the Windows desktop. You can't knock the OS on that unless it's GNU/Hurd-tier in compatibility.
>Does it have good clear documentations if shit breaks.
Man pages are like OpenBSD's: very good. Website/wiki tags along at a bit of a distance though. There's #illumos,#openindiana,#smartos on Freenode and you'll get an answer, within 10 minutes most times of the day, for anything you can't find on the site or in man pages.
>Does it respect the users privacy, security and their command.
Absolutely. Illumos comes with everything OpenSolaris had, including mandatory access control. All the code is open for inspection and compilation. There are no telemetry services within SmartOS, other than the ones you enable for monitoring in your own cloud environment with SDC. There's nothing like the shit Ubuntu pulled. You have full power on this OS. It is, after all, UNIX.
>Can it be run as a desktop OS, if not fine but don't whine about not getting desktop love, if the OS can not be adapted to one.
I have not tried to start X on SmartOS, but yes OpenIndiana is a desktop OS. I believe Tribblix and OmniOSce both can run X and do desktop environments. At that point and higher, it's pretty much the same as GNU/Linux.
>What kind of software does it have for users.
Almost everything GNU/Linux has. OpenIndiana comes with IPS (which isn't that great), SmartOS comes with pkgsrc, and while I haven't tried it I'm sure Gentoo Prefix will bootstrap in a normal Zone and if not then an LX-branded one. SmartOS also comes with Ubuntu and CentOS images for your LX-branded zones, so you'll be running Ubuntu or CentOS userland in a zone on top of Illumos kernel (which is giving the zone a Linux-compatible interface). I'm pretty sure SmartOS will run X, but if not I know the other 'distros' will.
>3D
Again, check and buy from the HCL. I believe nVidia has the best support.
>Can the OS provide a better solution than the competition. If not, stop whining about how much your pet OS deserves love.
In many use cases, yes. It's mainly a problem of lack of minds knowing it exists, and secondarily hardware. While your typical gaymer isn't going to like this OS, someone who is paranoid and wants to say run a darknet website should be deeply interested. I think anyone wanting to set up a cloud solution should take notice too. It's not going to run on your beaglebone, it's not going to run on your 20 year old Pentium II laptop. Again, if your prime argument that an OS is shit is because of hardware compatibility, you should uninstall GNU/Linux right now for being a hypocrite. You'd have smothered it in its crib in the early 2000's with that kind of thinking.