That was very interesting and unique. I just have not kept up with Apple things. May get me a mini in the future to play around with.What you’re saying is true, at least what the Mini is designed for. However it has long found itself in office, educational, and server environments.
That “image” of all of those minis hanging out in the background? That’s not for show. The Mini has been used as a "low cost" way to create clusters or used as low cost dedicated servers. There's even a company that specializes in deployment of these, though I would imagine most people in the IT space would simply do all of this work themselves.