I think it's a progression thing. Some of the stuff I used at first will never be used again but at the time had a purpose. Bottle filling wand and auto siphon are out do to the AIO. I have a punch corker and later bought a 2 lever corker that are now collecting dust because of the floor corker. The tree top bottle washer was replaced with a brass pressure washer and a tubing washer. Plastic 6 gal big mouth fermenter which is used only if all the other fermenters are being used. Still used but not nearly as much as before are label scrapers since I'm finding new bottles are much less painful especially when I can get them for $5.00/case. The last thing I can think of although absolutely not usless are glass carboys since my barrel collection is growing. Again, it's a progression thing which everyone has different priorities.