Yeah, it really sounds a bit low. I’m not sure what else goes into these containers. I assume there might also be a bunch of portable equipment and cabling that goes into moving the data in and out of the container? Power infrastructure and cooling and what probably takes up quite a bit of space as well.
Reminds me of AWS Snowmobile, which is literally a shipping container filled with harddrives.
I swapped to Linux for similar reasons many years ago. The initial idea was to hedge and get familiar with it so I had peace of mind. I ended up staying in the Linux sphere for most of my devices , except for my music production machine that still run windows.