The monolithic chain design works until it doesn’t. Avalanche’s subnet architecture lets you spin up custom, application‑specific chains with their own validator sets, tokenomics, and compliance rules — all while settling on the primary network. That’s not a side feature; it’s the only realistic path to enterprise adoption and regulatory compliance. The question is whether the ecosystem can generate enough demand for custom subnets to make the model self‑sustaining. Early signs are promising, but the real wave is still coming. Customization without fragmentation is a rare engineering feat, and this vault breaks down why it’s so hard to get right.