[happycube]

Basically they're reached the limits of what you can do with a 40nm process within (well, mostly) the power/thermal limits of USB microB with a basic heat spreader. While the ARM A53 cluster would almost certainly be available in smaller nodes, the uncore has sort of outlived it's welcome anyway.

[StudentStuff]

This line of chips from Broadcomm can only support 1GB of Ram, a hard limit for what type of applications one can put on it. Meanwhile, other SBCs have mainline kernel support now and boast 2GB or even 4GB of Ram.