Wait really? Layer management is just putting stuff on different colors so you can turn them off. It's not exactly rocket science. I've seen people name layers "new layer" and "new layer copy" for years and still get their work done. Maybe it just feels faster now because you finally sorted out your mess.
My old project file was a graveyard of "layer 47 copy 3" and it took me ten minutes just to find the text box. You're not wrong about finally sorting out the mess, but man, does it save time when you're not playing detective in your own document.
Nah, it's more than just colors. When you're on a tight deadline, hunting for "layer copy 7" wastes real minutes you don't have. Good naming just cuts out the dumb search time.