Insulate old building with 38 cm bricks using aerated concrete / Ytong

I am against insulation with Styrofoam for several reasons!

Every option has advantages and disadvantages. I would not immediately rule out this option. The image of a "flammable plastic shell made of hazardous waste" is not necessarily correct, or it must be weighed against the disadvantages of other retrofit insulation variants. The supposed breathing through several layers of purely mineral building materials is a matter that can be controversially debated.