Ironic since my experience during the transition away from ASCII displays and shortcut inputs is that the touch screens and deep menus were slow. Touch won because it was more approachable, at least for the shallowest options
Touch is fine when done right with responsive hardware. I'm not making a blanket statement about if touch is good or bad. This was just a poorly designed UI and software. Additionally, the light pens could be prone to error due to dirt and grime.