My steel backplate original IBM Model M keyboard in use continuously from when it was new until today. I can't figure out any way to improve it. Logitech trackman wheel from a decade or two ago, perfect to have a desk with 3 or 4 machines on. Must have thousands of hours of FPS and minecraft on it, feels new, feels perfect. The original Radio Shack wire wrapping tool, you could pay up to 100x more for something less…
I just got into Electronics and while buying some basic kit (cutters, wire, etc) I had to think hard about my soldering iron choice. I don't expect to solder a ton immediately as I'm still learning, but over time I may do it more. Thus, I was wondering whether to just pay out for a high quality iron, one I would never have to replace (or at least not soon).
I went with the Hakko. Bought some extra tips for the long run, and it's simply fantastic. Heats up incredibly fast, is very accurate, and easy to use. Sitting in my closet at the moment while I get a workbench eventually, but I eagerly have been using that thing every chance I get for the past several weeks. It's just fun to use and well designed.
I think the only thing the Hakko FXD could possibly improve is perhaps slightly improving the UX for preset temperature configuration. I'm not sure this feature even matters for anyone who isn't soldering constantly, though (I can basically get away with 750 every time).
Otherwise I agree, it almost seems perfect in every way.