None of these lights are steady-burn either:


I don't find that hard to "track" in the sense of where it is, approximately how far away it is, or what its headng is relative to mine. The key message is not "I am 200 meters away, plus or minus 20," it's simply "hey motorist, you're gaining on something fast, and it's not a car, give it space," with the corrolary of "those blinkie-lights generally mean it's a bicyclist, plan accordingly."

When the refrain of the motorists changes from "I didn't see him" to "I could not judge his precise range from behind, officer," I'll start worrying about range instead of just getting noticed.