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We apply the approach to the dynamically stabilized phases of SiO                     <jats:sub>2</jats:sub>                     , which are characterized by challengingly small transition entropies. All investigated functionals from rungs 1–4 fail to predict an accurate transition temperature by 25–200%. Only by ascending to the fifth rung, within the random phase approximation, an accurate prediction is possible, giving a relative error of 5%. We provide a clear-cut procedure and relevant data to the community for, e.g., developing and evaluating new functionals.                   </jats:p>"],"publicationDate":"2025-12-20","publisher":"Springer Science and Business Media LLC","embargoEndDate":"2025-05-01","sources":["Crossref","NPJ Comput Mater","npj Computational Materials"],"formats":["application/pdf"],"contributors":null,"coverages":null,"bestAccessRight":{"code":"c_abf2","label":"OPEN","scheme":"http://vocabularies.coar-repositories.org/documentation/access_rights/"},"container":{"name":"npj Computational 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