Bright flashing lights at night. Headlight: no. Just no. Taillight: maybe. Used in conjunction with a steady taillight on the street, I'm all in. But never on a path.
Other than in "peloton mode" it is hard to get feedback on how bright to be.
Just no way to give feedback. That said, I think a lot of folks are afraid of lights being too dim.
I was amazed at how bright my light models were when I saw them on another bike. Not always at a good level.
Even the small coin cell visibility lights do make a difference.
I ride enough where the value of a centrally controlled switching with modulation would be of value, but who but Varia even tries that?
I need something to light up the ninja joggers on the MUP, and spot the potholes. Flashing is hard to adjust between enhancing and annoying.
Frankly here, it is rare to see 25% of the night riders lit or reflectored, even to minimum legal standards.
You are more likely to see one with a gun than a headlight, here in the land of the free.