I've long hated the visibility arms race, but a few things are converging to make it especially urgent that we halt this madness and start to rein in the Space Lemon™ tendency - firstly the insane brightness of many of the lights now available to commuting cyclists, and secondly the likelihood that the rise of autonomous vehicles will take the form of attempting to create an even more highly-controlled road environment. Retro-reflectives look set to be a big part of this - I liked them at first because they seemed to me to be bucking the yellow high-vis trend and placing the responsibility for seeing what's in one's path on the person charging around with the glaring headlights. I've even got a Pro-Viz 360 jacket, which I liked because it's silvery and inconspicuous except under the lights of approaching vehicles, when it retorts 'Don't even think about pretending not to see me, m**********r.' However I'm going to ditch it once the current winter is out and become more resolutely ninja and lighting-minimalist again. As
@mjr says, it's about existing, and demanding that the operators of more dangerous on-road machinery acknowledge your existence.