alt Hacker NewsI think you should listen to bringup of Linux on Playstation talk from CCC to understand that those platforms are much more than just "somewhat customized".
There are whole sections of peripheral chips missing and they behave quite a bit differently with how they bootstrap and where things are mapped in memory.
Peripheral chips, non-standard bootloaders, custom hypervisors and similar is not what people mean when they say "run on a custom silicon".