I have no idea if it's a real source or clickbait, but...
Apple has already done an ultra high bandwidth connector, that's easy to align, connect, lock in place, and looks elegant - the processor to backplane connector in the 4,1/5,1.
There are easier ways to lock things, for example, a half-circle cam on each top corner, that sits within the volume of a "top" module, but which rotates up into the body of a module placed on top of it - have it mounted physically on the outside, so it's visible at a glance if it's locked.
The processor module could be as big as a full-size GPU accepting eGPU, "like a mac mini" may not mean a box literally the same size - look how big the processor section of a cheesegrater is, which arguably has better design for airflow and cooling than the trashcan
Macs used to come with passthrough power supplies, so you'd plug your monitor's power cord into the power out port on the mac. Cables which have a logical flow, for example loopback cables to mux video into a thunderbolt bus, are very elegant. Complicated internal circuitry requiring software control to route things is the rube-goldberg option.
"ProLink" it'll just be a PCI extender ribbon, in a different form-factor. On the Mac Pro it can be a set of pins and a socket, on a heavy-duty laptop it can be a cable (with an adapter that plugs into the module pin-ins). "It's External Graphics (because Apple avoids the term eGPU) on Steroids"
Though it might never come to a portable due to being a cold-plug only option.
Personally, I think some sort of full-fat pci socket on a cable, perhaps a locking cable the way a BNC connector locks, is more likely than a stack with passthrough pins, but all the same...
You can have more than one PCI slotted gpu in a row - that's all this stack concept will be, a stretched set of PCI slots.
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"good design has no need of
clean lines, they are a form of decorative ornament"
Jony Ive is not a
good designer, or rather, the design culture he has fostered does not produce
good design. It produces very attractive, highly
ornamented design, which almost universally performs much more poorly than an alternative, which concentrates less on the decorative ornamentation of thinness and minimalism, would perform.
- The overheating trashcan mac pro, that is Jony Ive design.
- The bent iPad, and bendable iPhone, that is Jony Ive design.
- The mouse that can't be used while recharging, that is Jony Ive design.
- The multiple generations of failing and unreliable macbook keyboards, that is Jony Ive design.
- The macbook that is unrepairable, except in giant expensive clumps, which has no way to physically remove and recover its storage if the path between it and the data socket is damaged, that is Jony Ive design.
Jony Ive design represents the sacrifice of utility, in the name of ornamental decoration.