I wonder who this is for. It could be a great homelab server, but only 16GB of mem ruins that idea.
https://www.ahead-it.eu/en/shop/servers/embedded-iot/intel-a...
Those?
Technically they are fanless but I wonder how well they would work outside of a rack with high ambient, they seem to be fanless themselves but still rely on having plenty of air pulled across the casing. Mounting them vertically might work. 850 euro though!
I feel these machines in particular are probably for office work where everything needed is online. I don't do IT but I would imagine that these machines would make the reduction of windows licensing fees pretty straightforward if your business is all done online.