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The payments stack has been unbundling for fifteen years - gateways pulled apart from processors, payment facilitators reshaped acquiring, orchestration layers sit above the rails. This post maps where crypto fits in that picture, written for people who already know the four-layer model and want a clear-eyed view of where chain-based settlement actually slots in.
For most of the last forty years, the payments industry has functioned as a vertically integrated stack. A merchant signs a contract with an acquirer, the acquirer routes through a processor, the processor connects to a card network, and the card network settles with the issuing bank. Each layer has a name, a role, and a price, but from the merchant's perspective the whole thing is one product: card acceptance. That bundle is coming apart. It's been coming apart for at least a decade, in ways that anyone working in the space recognizes — the rise of payment facilitators, the disaggregation of gateway and processor, the move from monolithic acquirers to modular API-first stacks, the appearance of orchestration layers that route across processors. Crypto rails are not the cause of the unbund…