I too thought the bucket indicator would be standard equipment on a JD loader. My 4210/420 is the first tractor I ever owned with a loader and the longer I have mine, the more uses I think of. The biggest advantage of a loader is the multiple tasks it can accomplish, I use mine for snow removal, material digging and transport, leveling, moving huge stones, picking up logs to section into firewood, etc. Had to sharpen the blades on my 60 inch 7-Iron deck this spring, it weighs 400 lbs.....just hoist it with the loader and go at the sharpening. I've got a huge lot with lots of tree debris to clean up in the spring, just fill the loader bucket, drive back and dump it on the brushpile. Sure beats filling trash cans and putting them on a utility trailer and going back and dumping them on a pile seven feet high...
If you get a loader for your tractor, you are going to wonder how you ever managed to do without one for so long.