Really? Since when is mentioning hardware specs considered "open sourcing"?

Quote: We've open sourced Azure hardware specs, opening SDKs, and we're making systems more pluggable than ever.

Datacenter hardware designs are valuable. They solve physical limitations of heat dissipation, airflow, as well as compute power density problems and electrical stuff.

Companies building their own DCs spend a lot of money on doing this, so companies like Microsoft (I think Facebook do it too) showing off their designs is really useful.