I think it would be much easier to the public if relays were renamed to "channels" or "waterways" or "hoses", or "powerlines" or anything that automatically remembers people that are they work in parallel and this blocking one has no effect on you
Discussion
If you find a good word starting with R I'm onboard.
https://relatedwords.io/transports?starting_with=r
Railway, road, rail, river,.radiostation
I like river because if you think of water flow (water is your message), if one river is full or blocked the water will pass thru other river.
Notes and other stuff transmitted thru rivers.
Notes and other stuff transmitted thru Radiostations (or radio channels)
In this radio analogy,. someone chooses to voice his thighs over many radio channels (like 90Mhz,.102 MHz) and people can listen to all those stations.
If one station fails, the other still works