Tell me about all the Windows programs I can install from the command line.
Ha. I was just teasing, but you actually made my point for me. Installing stuff in Windows is dead simple, and you don't need the command line to do it. However, if you want to, most programs can be installed via command line, scripts, batches, etc. It's not as consistently easy or uniform as it is with 'nix of course, but that's what happens when software is proprietary. All the same, it can usually be done, though I don't know why anyone but IT departments would want to. And yes I know you don't need the command line in most 'nix distros anymore, but I've personally always found it preferable to the GUI package manager. I think it's great that Linux has caught up with Windows in that regard, but I think it's a little naive to believe that that's some kind of special advantage for Linux.
Don't be so sensitive, or JMad will call you the UMDNats of Linux