

But what real-world significance does this have?
None - I don’t know of anyone that parses release names. Versions, yes, absolutely, but silly version release names?
I came into the comments to see what other reason there was, but it seems it’s a non-story.
You could do it for free. Take the guts out of your old PC, leave the HDD’s in there and the existing PSU. Extend the sata cables through to your MiniPC.
If the PSU won’t fire up, then there’s a couple of pins in the main block you can jumper - or fit a momentary switch to - to act as a switch.
The old PSU will still be reasonable efficient, since power is not wasted except as heat, and it shouldn’t get hot running just the hdd’s. 3.5 hdd’s use around 8-20watt each, depending on spindle speed, so at most it’s 100w at startup, but probably settle down to ~40 for the drives.
Or - yes, those things you linked will work too, but they’re basically doing the same job as the above.