Nobody wakes up and decides to abandon a working, deeply entrenched system out of ideological pureness. People and businesses stay on Visa, Mastercard, and legacy payment gateways because they work fine for standard, low-frequency human transactions. The breaking point arrives when autonomous AI agents enter the economy at scale. An AI swarm doesn't make a single $50 transaction once a day; it makes thousands of sub-cent transactions every second—paying for raw compute per millisecond, purchasing fractional datasets, micro-tipping API routes, and subcontracting tasks across peer-to-peer networks. When swarms try to execute that volume over traditional payment networks, the entire machine hits a wall: The Fee Barrier: Legacy payment rails are structured around flat minimum fees (e.g., 21¢ + 1.5–3.5% per swipe). On a 0.001-cent machine request, the transaction fee is thousands of percent higher than the payment itself. It is mathematically non-functional for micro-payloads. The Throughput Bottleneck: Traditional rails peak at around 50,000 to 80,000 transactions per second globally. A single enterprise AI cluster coordinating millions of micro-tasks will instantly saturate that entire capacity, triggering rate limits, frozen APIs, and skyrocketing latency. The Permission Gate: Visa and Mastercard require accounts, identities, and manual settlement rules tied to human banking structures. Autonomous agents cannot open traditional bank accounts or wait 48 hours for batch-settlement cleared through legacy merchant accounts. This is why having a drop-in replacement ready on the backend is everything. Through P2P overlay networks, BRC wallet standards, and Simplified Payment Verification (SPV), the user experience doesn't require a radical interface overhaul. Developers can simply swap the payment driver on the back end—routing machine-to-machine traffic away from congested card networks and onto an un-gatable UTXO bare-metal mesh. The end-user or agent doesn't need to care about the underlying protocol mechanics. They will use it because when Visa throws a "rate limit exceeded" error or charges $0.30 for a micro-call, the BSV overlay routes it in milliseconds for a fraction of a cent. Adoption won't happen because of a sales pitch—it will happen because the legacy rails literally choke on the velocity of the future.