Are you saying the power required for wifi transmission is lower than the power required for usb?
Also, what's a BA?
Also, what's a BA?
You will likely find a BA (or someone with a similar role under a different name) in most large organisations (and likely in quite a lot of medium ones, too).
An additional device just to facilitate wired network usage over wifi usage felt like unnecessary additional complextiy and probably higher power usage. The blog author replied, however, saying that wifi was a bit flaky, explaining the design choice.