One thing that comes to mind while thinking about the input from co-location guys.
They want:
1. lower power draw (and heat generation) - better for their power bill
2. less of a rats nest in terms of cables (currently power has to be 2m away from the Mini in a co-location facility)
3. Easier to fix in case of issues
They don't care about:
4. total number of ports - fewer ports are fine by them I'd guess
I think a trade off could be that price stays the same or even potentially drops a little
So what we have coming up is a 3nm M4/M4 Pro that not only uses less power than even M1, even the Pro version uses less power than the previous generation (suspect someone had a word after looking at the M2 Pro power consumption under load).
Supply chain wouldn't necessarily be aware if the mini format continued in the existing mini case but with the M4 Pro only.
And what if Apple were to release a Mac Nano (just M4) in a tiny case and with 2 or 3 Thunderbolt ports plus HDMI and ethernet?
Power over Ethernet makes cable and power management less of a problem - if the power supply breaks an external power injector/supply is easy to swap out and PoE cabling can be a lot longer.
Obviously, for domestic users - lack of ports is potentially a pain but I'm sure there will be folks who come up with solutions, Thunderbolt docks would be an obvious one - USB-C ones a cheaper way out. Still waiting on manufacturers to do one with an internal PCIe SSD interface.
Could an M4 (and M4 Pro) mini be powered off as high power iteration of
Power over Ethernet? It might already be happening in part thanks to the iMac 24 power supply to be fair.
That would explain a reduction in the number of USB ports - assuming Thunderbolt has to provide 15w while USB-C only needs to provide 5w. If you no longer need to power a screen and speakers plus the potential for extra (unused) ports, the 134w iMac PSU remains overspecified for the task.
Let's say that an M4 Pro is broadly the same in terms of power draw as an
M3 Pro - the linked article suggests average consumption of 30w. It's already been noted that the M3 Pro appears to be tweaked for lower power consumption rather than performance as the M2 Pro was.
If a co-location data centre only needed to power an M4 mini off an ethernet port (having upgraded their switches to support the high power PoE) then could they see it as a win for them? Or even if not then an adaptation of the iMac power supply so that instead of MagSafe it was acting as a high power PoE injector (90w for example) feeding a standard Cat6 Ethernet cable of sufficient length into the back of the mini (wherever it is) to provide power.
Apple could then provide a 2m cable in the box (for example), and a user need only provide one of suitable longer length if needed.
Feel free to correct me if I am missing something.