In the future, if automated cars become ubiquitous, then I would consider a beacon if the car manufacturers made them absolutely free to cyclists. I definitely should not have to pay to make their vehicles safer on the road. I currently do everything I can to make myself safer on the road from human drivers (hi vis stuff, lights, helmet, etc.). Yes, I pay for that myself. But that stuff makes me more visible to other cyclists and pedestrians as well. This beacon will serve one purpose only so the car manufacturers can pay for it. I'll just have to remember to remove it before I ride my bike out to rob a bank so they can't track me during the getaway, lol.