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Haiku Got Awesome. Really Awesome.
(www.youtube.com)
I tried it in a VM. It's very quirky. This post actually just triggered me to look around for Open Solaris.
I feel like that would be a great contender as an alternative OS since more software runs on it.
OpenSolaris was insanely wonderful. I still have a collection of original, from Sun Microsystems, DVDs and CDs for Solaris, OpenSolaris and Solaris Express.
IBM and Lenovo ThinkPad laptop enthusiasts!