I agree with you Phil, I have the low fuel sensor and there is only one thing it has ever done that I think was useful: On a flight years ago I was heading into an airport to refuel, so my fuel quantity was quite low but not below the proper safety reserves. I had been flying high so I was in a long protracted descent at a fairly steep nose down attitude to lose altitude quickly. Sine the fuel was low my nose down attitude unported the wing fuel tank outlets and I was only running on fuel in the header tank, which quickly reduced the level and the low fuel warning light came on. I immediately leveled out my flight attitude and the fuel system started working properly again; a few minutes later I resumed my descent and landed with no problems. Without the low fuel sensor I probably would have starved and killed my engine before I realized what was going on and leveled the airplane. Most likely I could have leveled and done a restart with no problems, but who knows if it had happened near the ground. This was the one and only time I did appreciate the low fuel sensor. Just some food for thought from an actual experience.