I'm not a software snob I've used pretty much every OS over the years i'm an anything that will get the job done kind of guy, but i work in Linux so i use it at home as well and it's a pain in the ass to maintain two OS's and the software that goes with them.
They have an osx version which is POSIX compliant operating system so compiling a *nix version would be pretty simple. I guess they don't think there is a big enough market for it. Which for 3D software is pretty silly in my opinion. Nextlimit, Mental Images, Autodesk, The Foundry and most of the rest of the high end 3D vendors defiantly see the point of a Linux version of the software.
No Linux version... no money from me
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Dave