> the issue is the internal power supply is not redundant, even if you supply it with an ATS or UPS, that component can still die taking out the entire thing.

I mean, its basically the same thing in the MacBook, no ? The SMC ?

After all, there needs to be a magical chip inside to make sure you don't, for example, fry the laptop because it accepts charge via both USB-C and the MagSafe port.

Sure SMC failure is incredibly rare, but it doesn't mean the theoretical SPoF is not there.

Also when was the last time you had an internal PSU on a Mac fail ? Its been a very long time since I've ever seen one, and that's even thinking back to the old days with the old-school canister capacitors. Say what you like about Apple, but on the whole they do a decent job on their BOM selection.