I see no evidence that those are anything more than rumors. Apple hasn’t used multiple AS chips up to now. It seems more likely that they’ll just keep developing bigger and bigger chips. Whether that will happen in time for a spring 2022 release is unknown, however.
Wow, how dare I mention a rumor about the ASi Mac Pro lineup, while I am here on a rumors forum...! ;^p
Highly doubtful Apple is going to develop "bigger and bigger" chips... The larger the die, the lower the yield per wafer... The larger the die, the lower the yield due to failed chips... The larger the die, the higher the cost of the finished product...
But by taking multiple SoCs & integrating them on a SiP (System in Package), one gets a "larger die" that does not have the issues associated with actually trying to produce massive dies...
And why would Apple use multiple SoCs so far...? None of the current Apple silicon products need it, nor have they ever had multiple CPUs...
The Mac Pro is the only Mac product (ignoring the XServe) that has used more than one CPU, so it only makes sense the Mac Pro lineup would be the ones any multi-SoC designs were reserved for...
I think the new iMacs will have M1 Pro and M1 Max inside.
I think you will need to look to Mac Pro for multiple M1 Max in a single Mac.
I am however puzzled about the Mini… I think the M1 Pro and M1 Max SOCs will be too large for a Mini… so we might just get an M2 Mini when the M2 MBA releases…
So I’m getting an M1 Max MBP - and if I need/want to upgrade from that I will.
Not too large, just look at the teardown videos for the 2018 Mac mini, the 2020 M1-powered Mac mini, & the 2021 16" MacBook Pro...
Looks like plenty of room for a M1 Pro / Max mobo in there...!
Both the 2018 Intel Mac mini & the 2020 M1 Mac mini have the same 150W PSU, so no need to change that...