Thank you for yoyr reply. It took me a bit to realize/remember that the Radio Power module just supplies power to the Radio, it is not the Radio. So, teams still do have one other port for comms (though a switch is certainly more reliable). It is wonderful that you all may consider a 5 volt/alt power supply in the future.
I do think that our concerns could ve addressed in documentation as well. As you say, there are a host of options already. So a preferred way to get reliable 5 volt power for a raspberry pi and possibly a switch (depending on the switch) would be plenty. As I was reading some of the replies, it occured to me that it took us years to realize we could power non-motor 12 volt devices from the pdp directly. We thought it all had to go through a VRM.
A quick, unrelated, budgetary question. Do you know whether this control system hardware will be compatible with the current (soon-to-be old) generation roborio?