Why? My view is why not?! A few years ago a friend asked if I wanted an old Leko stage follow spot. Being a bit of a lighting pack rat I said “Sure!” I originally used it so I could apply light shaped with gobos in my still photography for dance. It also allowed me to create lovely rays of light using haze combined with different gobo shapes. In its original state the Leko was a 1000 watt constant tungsten light. Plenty powerful for stage applications, but completely overpowered whenever I used it in conjunction with my Einstein strobes. Even though the Steins can go as low as 2.5WS doing simple math shows you that at 1000 watts shot at 1/250th of a second yields about 4WS, not a ton of power.
I have always liked the look of ringflash portraits. There have been several times in my career that I wished I had one. But because I find their use in my work so specialized I didn’t want to commit to purchasing a studio unit. My partner had tried several of the on camera flash types but I didn’t like their light output. So to replicate the look of a ringflash I often used my 86″ diffused parabolic reflector, stood directly in front of it and photographed the talent.