Astro is useful when the public experience is mostly content, navigation, forms, and carefully chosen interactive islands. It does not automatically replace an editorial system, a commerce engine, an account system, or an integration map.
What the architecture can look like
Decisions the audit must settle
Keep WordPress as a headless source, move to another CMS, use a structured Git workflow, or provide a fit-for-purpose interface.
Rebuild delivery, spam protection, validation, success states, and notification routing.
Choose site search, external search, or a content index appropriate to the collection.
Agree the deploy path, ownership, monitoring, support, and handoff before launch.
Map old paths and verify that canonical, metadata, internal-link, and sitemap behavior is intentional.
Where Astro may not be the right fit
Commerce, memberships, LMS workflows, marketplaces, and application-like experiences can require live state and account logic that change the project substantially. The maintenance-versus-migration guide explains the broader decision, and the cost guide shows what adds scope.