I'm deeply familiar with FAT andamera systems in track and field. I often wonder if they are a relic but in track the timing can be trickier due to location of

I'm deeply familiar with FAT andamera systems in track and field. I often wonder if they are a relic but in track the timing can be trickier due to location of the torso. Wouldn't a transponder on a each headtube in the race potentially work better? They could talk communicate with sensors all around and in the finish line.