Quote - Blender was not born on Linux but on SGI and then ported to Linux. The design of the interface of Blender has no connections with Unix, in fact there is no other tool, from Unix or other OS, that has a similar design.

Linux gave it the option of being open sourced, which led to rapid improvement.  SGI used what, Iris or something?  Whatever it was, it was some kind of *nix.  It seems to me that all flavors of Unix use keyboard input the most of the popular OSes.  Programs originating on the Amiga (Lightwave, Truespace, Cinema 4D etc.) and Mac (Carrara, Poser, etc.) have used the mouse primarily since about the second generation of 3D programs.  Dos and *nix developers liked hotkeys and scripting, as it was consistent with their use of the console to use the OS.  Mac and Amiga developers were always trying to perfect a VR like interface that would mimic traditional sculpting and hand-animating.