with LORA, discussing global blocking in multi-stream environments:

xxx: Who can explain: how and what are these blockages affecting?

Yyy: Imagine you’re going to a store, a big supermarket, where there are 20 cash outlets. You have picked up the fullest car of sacrifice, for a year ahead, joyfully you go out, to the box office, and you observe this picture: at the same time, out of 20 box office, out of 20 cashiers sitting on them, only one customer serves, because the shop system does not allow several cashiers to work at once, that is. 1 works, 19 sit and smile, wait when their turn comes, as soon as the one that worked ends the processing of the client, access is given to the arbitrary of the 19 that waited, now she works with the client, and the rest wait and smile to the buyers (who no longer especially smile).
This is the global blockade.

zzz: You have accurately described "Five" nearby :)