Universal coverage becomes possible at Tier 3

Tier 2 extended coordinated preservation to a handful of well-funded disciplines — nucleotide sequences, macromolecular structures, particle physics. The 73-93% of research output that sits outside that coverage — cross-disciplinary work, small-team studies, underfunded projects, data types without a community standard — becomes preservable for the first time, at near-zero marginal cost on infrastructure institutions already operate.

The universe of research data with durable, verifiable preservation expands from the covered disciplines to the entire research enterprise. The economic constraint that produced the current coverage gap (Tier 2 fees priced for well-funded consortia) is not technical — it is structural to the consortium-membership model. Tier 3 has no equivalent constraint because participation cost scales down to zero on existing infrastructure.

This is the most direct constructive consequence of the architectural argument. C-0029 establishes the necessary architectural property; C-0035 names the consequence: every research dataset becomes preservable, not just the ones in disciplines that could afford the consortium model.