Who are these mythical people that only liked Intel (or external peripherals) after Apple adopted them? Are they from straw-man land?
Intel won that fight on being at least a generation ahead in semiconductor technology. Intel have efficiency problems compared to the ARM processors now, because they can't just throw many more transistors at their design when the metric is amount of processing/watt.
It's mainly non pros that argue that a few internal 2TB bays would be enough, which is laughable for pro use.
Don't get USB hard disks old pretty quick ? (and the performance with GByte LAN is much bigger). So it's just a single LAN cable ?
Anyway, what kind of high end Mac user ever bothered with USB drives, when you could use Firewire and have double the throughput with no CPU overhead?
"Additionally, users aren't required to install scary-looking computer hardware into PCI slots."