I just looked too and see they're on there now. This wasn't the case for a long time.
The steel is indestructible unlike a stone that may break. I've never had it happen to me but it can happen. The heat retention and distribution of steel is much better than a porous stone from what I've read.
As with most things there is a learning curve to get the best results. I may need to pull the trigger and test one of these out myself 🙂
I know ! I already ordered one!!!