Good thread title. I rarely ever use it, maybe twice a year. Last thing was for bass on an album by Daniele Luppi, in which I was tasked with a deep emulation on some tunes to do the Dave Richmond/Herbie Flowers thing a la Melody Nelson. The tapewounds on that bass really help the cause and I can get it to sound not too far away from a Burns Bison (bass on those original recordings).
All that said, I'd love to equip it with some rounds someday to cop that David Wm. Sims tone. I can kinda get that with my Geddy Lee with DiMarzio's that I also have, but those pickups aren't single coil and not quite bright enough. I do have one more Jazz, a Custom Shop that was done in the style of a '64, and it's great. But it's sitting at my cartage company and hasn't been pulled out for use in at least 5-6 years. Maybe I need to reconsider sometime.