Rendering strategy sounds academic until the invoice arrives — server rendering everything is the expensive default that most content sites never needed.
A simple boundary
Prerender everything whose content is known at build time. Use ISR for content that changes on someone else’s schedule — CMS publishes, catalogue updates. Reserve true SSR for pages that differ per request: carts, dashboards, search results.
If any of this maps to a project you are planning, I am happy to talk it through — no pitch, just a second pair of eyes. Start a conversation