I count stability and good engineering as a feature. I suppose there's nothing which would necessarily compel anyone to adopt it, but there's a nice sense of in

I count stability and good engineering as a feature. I suppose there's nothing which would necessarily compel anyone to adopt it, but there's a nice sense of integration between everything. Once you've got the hang of Solaris, everything "just works" and fits nicely together. ZFS integrates with zones which integrate with resource caps which integrate with SMF which integrates ... etc. I would be very surprised if OpenSolaris displaced Linux, but I suspect it'll always have a place in the world. The BSDs are still around and healthy, and innovating quite nicely amongst themselves. Linux seems to be a default choice rather than something you choose to use. I also hear some people run Windows on servers, although I can't quite believe it myself.