I'll assume you mean glow...

I think it has more to do with legacy. I've been flying glow for 31 years. I have all the support equipment for glow (engines, props, parts, fuel pumps, starters, glow drivers, exhaust systems, couplers, engine maintenance tools (bearing pullers, etc) and so on) and I know how to make them work...well, most of the time. It's a significant investment, not to mention I have at least 20+ glow planes from over the years. Glow won't go away for me for a long time. And...it works. I fly 14 min per flight...twice through my pattern (or one P and one F as is usually the case). That's tough to do with electric, and trust me, I need the practice.

All that said, if I was starting new...I'd go electric. But the cost to convert is high. New airplanes, new motors, new support equipment (chargers, transformers, generator, etc) and a reasonable learning curve. Not to mention that I've got 84 gallons of 30% in my garage.

I think straight cost per flight is about equal at this point.

I will likely eventually make the plunge, but for now I'm all glow.