What would be the benefits of frying your brain over coming up with a design for an icon that potentially nobody might understand right away? Fu's way of doing things is just fine in the given context, even more so since the default minimized nodes don't even show an icon. In fact your desire to have icons would only eat up more screen space and add distracting noise. Pardon me, but you're making a lot of fuss over nothing. And seriously, since you are old and have worked in other industries, just look at CAD programs, electrical wiring programs, accounting programs, banking software. They all have limited use of icons, but know what: They work wonderfully based on shortcuts, just typing command sequences in the right places or ugly text-labeled buttons. It seems to me you are laboring under the notion that just because you are crafting pretty pixels, the tools you use for this work need to be just as pretty, which IMO is utter nonsense. It's all about efficiency and finding stuff quickly and whether that's done with icons or text is ultimately secondary, if not even utterly irrelevant.