Kinda unimpressive since it seems that it's just mac studio with pci-e expansion
We'll see what happens with release, but as someone with two Intel Mac Pros in use, not quite sure I see a reason to switch still (though my laptop is the M1 Air released 2 years ago).
I suspect that it is. Feels like less can go wrong. You have physically shorter interconnects, and the RAM is perhaps more of a known quantity relative to $SOME_RANDOM_MANUFACTURERS_DIMMS. But that is only a guess.
However, I don't know if that's true. I guess it's not necessarily more resistant to random cosmic rays or whatever.