OK. I've never used one, I just know that once upon a time people here liked them. And they are "real" strobes. In my mind "strobe" means specifically gas discharge lamps. Flashing LEDs are just flashing lights, even if they're called a "strobe" mode.

That said, I used to use a proper strobe, but these days I just use flashing LEDs. They're far more reliable and these days I think just as effective if not more so. The actual strobes I used didn't agree with the bad roads I rode on and the photoflash capacitor would tear loose from the board about once a year.