That said, it's not clear here what people in the thread even mean by "enterprise grade". Some of the commenters seem to assume "enterprise grade" is defined solely by how loud it is. That's not the definition.

Enterprise grade simply means top quality hardware such as Supermicro boards, ECC RAM and quality components built for 24x7 use for many years. Some of it is enterprise-y features like remote management which is fun, but hardly necessary at home. I do admit it is fun to access the remote management console of my rack servers from my home office, although clearly I don't need it since I can walk 30 seconds down to the garage and access the console directly. But of course a home rack is something to be done for fun, so fun counts as a feature.