The blog an-architecuture.com offers this to contemplate:
Energy-optimized buildings usually require thick thermal insulation: Improved insulation can lead to energy efficiency and will reduce CO2 output. Superinsulation is one of the strategies to achieve the passive house standard – a standard for central Europe which requires that the building fulfills certain requirements, for example: a building must not use more than 15 kWh/m² per year.
Is the resulting wall thickness aesthetically questionable in architectural design? Does it result in bunker-like structures? Definitely, designers should be aware of the growing demand of thermal insulation – and - why not go for bulky buildings? "
Maybe the glass in the superinsulation illustration could be flush with the facade, so you could sit and enjoy the window's warm sill? Or not.