I've heard about glass top stoves cracking with too much heat, so a huge boil on those might not be advised. I only boil about 4.5 gallons so I'm not too worried about it. Coil stoves suck because the coils aren't too stable when too much weight is on them.
I've heard people concerned about cracking, but never heard of it actually happening to someone. Those burners themselves are much hotter than the pot of 220F wort on top.
One downfall though is it is much harder to regulate temperature since, especially with ceramic top stoves, the glass stays hot for a long time after the burner is turned off. Boilovers made easy!