I think given sufficient infrastructure this is a bit of a non issue or otherwised solved by putting 2 eurodollar glowing slap bracelets on your arm, I find it fascinating mostly because I love bicycle gadgets.
Having said that: I think there's quite a few cases with people with disabilities this'd be hella useful for or even just open up bicycle transportation at all and for beginners, if costs go down, this could also be good. I mean riding one handed is a skill distinct from being able to ride a bicycle.
Positioning needs some work though imo, I've seen a lot of "mounted next to the rear brake light" solutions and it feels kind of too tiny as per distance. I think maybe some sort of Fisher 360° light approach'd work better, i.e. projects downwards also:
This does have the problem of being still hard to see out of your angstpanzer 4.0 at any distance less than 20m, but I don't think you can engineer yourself out of that one without touching the angstpanzer 4.0
also looks like Need for Bicycles: Underground 2 as a bonus tbh


no way in hell would anybody add ~500g of weight at a minimum to their expensive carbon road bike