Hmmm interesting, I'll have to look into one! I've been using a ceramic one for ages, maybe I've been missing out

But they don't absorb moisture - one of the benefits of a ceramic pizza stone is the stone absorbs excess moisture so the crust turns out more crunchy

It would be clearer to plot just the delta, no?

I thought the orange line was just indicating where Halloween fell on the chart and was confused...like it's roughly constant all year lol. I feel like making the Halloween line orange makes it look like an indicator line instead of an addition bar on the histogram