Comment by NotARoomba

Yes it is a relay hop and the latencies do stack. If a key is connected on all 4 sides then in the worst case scenario it will have to receive 4 and send out 1 to the best path to the master. Ideally the master doesn’t poll and an interrupt would be triggered on a keypress. there might be a way to batch them but it would probably run on a FIFO basis. I could turn it into a CAN bus but I still have to test out if that would be better than the current system.