Why would "every relay getting pummeled by a load of clients simultaneously, all trying to push the same message"?
Relays get one client pushing one message. That one message is pushed to multiple relays. To your own preferred relays, as well as to the preferred relays of others who are involved in the conversation, as well as to a couple of global relays for easy discoverability.
These global relays are useful, but are interchangeable and totally replaceable. As soon as you've connected with someone you can retrieve their updates, because you know their preferred relays, and can query them directly.
In this way Nostr has the benefits of centralised networks for discoverability, federated networks for communities, and private individual web site for p2p and archival purposes.
Why would "every relay getting pummeled by a load of clients simultaneously, all trying to push the same message"?
Relays get one client pushing one message. That one message is pushed to multiple relays. To your own preferred relays, as well as to the preferred relays of others who are involved in the conversation, as well as to a couple of global relays for easy discoverability.
These global relays are useful, but are interchangeable and totally replaceable. As soon as you've connected with someone you can retrieve their updates, because you know their preferred relays, and can query them directly.
In this way Nostr has the benefits of centralised networks for discoverability, federated networks for communities, and private individual web site for p2p and archival purposes.