In respect of processors, btw, I found this very illuminating:
https://www.engadget.com/2018/10/31/macbook-air-intel-processor-cooling/
I would like to see what would happen if more OEMS took this approach to design--putting 5W CPUs in a chassis designed for 15W, putting 15W CPUs in a chassis designed for 28W CPUs, putting 28W CPUs in a chassis designed for 45W CPUs....You get the idea.
I would bet performance might increase because the CPUs could run at a higher frequency for much longer before throttling down.
This is a very surprising move for Apple. Instead of shrinking the internal space as much as possible, they preserved space (i.e. recycling the nTB chassis) and used it intelligently--for cooling and better (CPU) performance. I am still concerned about the MBAs anemic iGPU.