> > Wide architecture support (x86, x64, mainframes) > > AFAIK it doesn't run on current mainframes. Only IBM's various OS's > run on mainframes, as IBM has a corner on that mainframe market.
Not true. Several Linux distros run and are supported on mainframes. Debian, SuSE, Fedora, RedHat etc. There was even a Slackware port. I consider that hardware abuse but it does work. Really none of the OS that run on desktops or servers can exploit what a mainframe is designed to do, it really doesn't make sense to use them. However a mainframe running VM with hundreds or thousands of Linux guests does make sense. It's green since it replaces many servers and uses less power and takes up less space.
