Comment by goosedragons

There's still lots of utility in 9th gen intel PCs. And it's cheap to get extra utility. The resale value of the Mac mini is down to the brand cache and that there's not a glut of them on the secondhand market from businesses upgrading overtime.

You can also get PCs in a similar form factor to the Mac Mini but they still have RAM slots, M.2 slots and sometimes a 2.5" drive bay. You could get one that's powered off the USB C PD from the monitor requiring only a single cable and could be mounted on the back of the monitor (mount included!).