Wood is never stable, it is just less likely to move / split, if it reaches the EMC of the area it is going to live in before it gets there!
I'm happy to do a home seasoning thing after the York do, but I'm a bit busy right now!
I've heard, and used degraded wood but I've never heard of wood too dry to use!
Modern sealed central heated houses can go as low as 8%. The wood EMC cannot go below that!
If you do live somewhere with a lower MC than that, your face is going to crack!