Ankerson,
the reason you didn't think or know of a multitool in the 80's is because they hadn't begun selling well yet. Also, slipjoints aren't so quick and they're hard to open during stress, especially if they're a bit corroded or dirty. Folders weren't as practical back then. Point A to B isn't the way it works anymore. The current battlefields don't look like they used to with front lines n' stuff. The reason the modern soldier has so much gear is because he needs to do different stuff. Before it was much like you said. Today it's different. Today, you need a lot more tools for the job, because it's much more dynamic now. I'm not saying that the previous gear setup was inferior, just that the conditions were different and that such a setup wouldn't be as effective today.