You do wonder, following a bit of analysis with benchmarks, if some classic Mac Pro owners on a budget might view the 2018 Mac mini as a viable upgrade path. After all these years the advent of Coffee Lake with extra cores means that the horsepower is now able to compete with 2012 Mac Pros. Anyone needing GPU can now add that on, there's a 10 Gig Ethernet option for power users, the PCIe NAND Flash is presumably as fast as anything in the current Mac range and Thunderbolt 3 will take care of other needs.
Maybe this generation of Mini is not looking at PC switchers but classic Mac Pro switchers?