Avoid The Mac App Store via The Terminal

I avoid the Mac App Store as much as possible. It's buggy. It's slow. Apps are getting pulled from it left and right. But I couldn't avoid it permanently because of software updates. As macOS Sierra 10.12 rolled out, I clicked on the App Store, followed by updates, and...

I couldn't get the updates page to open. Killed App Store. Restarted computer. Everything.

After doing some research, I discovered there's a way to update software from the terminal: softwareupdate. So, after running one command (sudo softwareupdate -iv), I'm writing this from the latest version of macOS Sierra.