Teranode is already proven to move over a million transactions per second. Submitting a transaction scales easily, but confirming it is the choke point. To know a transaction has been seen, a tracker today must watch the entire network's traffic and sift it for the few transactions it cares about, work that grows with the whole network rather than with one application. Best-effort gossip also sends each update many times over and can drop one silently, leaving a transaction stuck with no warning.
Structured IPv6 multicast changes the math. A transaction's ID maps deterministically to a delivery group, so tracking can be split cleanly across many machines with no central coordinator. The network delivers each update once instead of many times, and every message is sequence-numbered so any gap is caught and repaired automatically. There are no silent losses.
The result: transaction tracking keeps pace with a million-plus-TPS network instead of bottlenecking a single listener, while the application-facing API stays unchanged.