lxskllr
No Lifer
Total difference of outlook. None of your examples are important application types to me. My outlook on computing (and many other people) is that a computer is a tool for creating other things that will exist out in the real world, NOT just something I need tools for just for the computer itself. So system monitors, command lines, etc... those are mostly just things for dickering with the computer itself. To me that's a distraction, not a task in and of itself. So my focus isn't on freebies for dickering around with the computer itself (although I like those things at times, because I do love computers and tech) but on tools to do work, that pays me a nice living IE: commercial software.
The terminal isn't just for dicking with the computer itself. It's a generic interface that can be used to manage one computer, or thousands of computers. It works by itself, or in conjunction with other programs without limit to program type. Graphic artists can use it as well as engineers and scientists.
As far as stability goes, I'm typing this on a computer I installed in 2008. I did an in place upgrade in 2010, and it's still going. I haven't had a minute of downtime. With GNU/Linux you have the option of running bleeding edge software. Don't blame the system when that bites you in the ass. When you install something that hasn't existed for a month you can expect occasional problems.