Couldn’t agree more: really good progress.
We have an old soldier’s croft from 1804, which we bought in 2006. The previous owner had clad the inner faces of the logs (it’s a log house) with OSB, and despite wallpaper with a layer of paint on top, the OSB absorbed moisture until there was a heating system that kept the indoor temperature constantly above >15 – 16 °C.
There used to be a thatched roof, which, under the pressure of insurance fees, was replaced by a tin one. I am now insulating the attic, and have learnt that sunlight can make tin roofs very hot, resulting in sweating of moisture from underlying wooden roof, with condensation occurring on the plastic beneath the insulation slabs (i.e. facing the attic, which on a sunny day during summer becomes the coolest surface). It has taken some time to reduce the moisture content of the wooden roof.
All in all: you might come to the conclusion that plaster boards have their advantages (to say nothing about mineral boards)!?