Tier 1 is one organizational decision away from the same outcome as Tier 0

Tier 1 — a single copy held by an external hosting provider — is a genuine improvement over Tier 0 in the dimension of local hardware failure. It does not solve the problem of platform failure, and the platform can fail through bankruptcy, acquisition, defunding, jurisdictional change, or internal reorganization as readily as through technical failure.

Three structural vulnerabilities make Tier 1 only a partial improvement: (1) platform opacity — the data exists in one organizational context, subject to one provider's business decisions, funding continuity, terms of service, and infrastructure choices the customer cannot see; (2) funding-model dependency — most research-facing hosted storage survives on grants, institutional subsidies, membership fees, and philanthropy, none of which are contractually protected against reprioritization; (3) jurisdictional exposure — data on a provider's servers is governed by the laws of the country where those servers sit and where the provider is incorporated, neither of which the researcher selects.

The empirical input to this Claim is E-0006: 191 repository closures since 2012, median age 12 years, 47% with no migration. The median Tier 1 platform persists for 12 years before its preservation contract evaporates. For most research papers the citation tail is longer than the median Tier 1 lifespan. The architecture is one organizational decision away from producing the same outcome as Tier 0 at scale.

For the majority of researchers who follow current best practice, Tier 1 is the point at which the data-management journey terminates. The architecture is therefore a major contributor to the C-0002 baseline, not a reliable defense against it.