Comment by rhelmer

I suspect they are both more familiar with client-side rendering, and also thinking of things being able to share components, reuse existing libraries, and so on. So re-implementing everything with vanilla HTML and forms feels like reinventing the wheel to a team used to an SPA component library, it's not that it's intrinsically harder, it's that they don't have the existing building blocks they'd normally reach for.

Modern frameworks such as Astro allow for a similar development experience (and can optionally use JS, React and other client-side libraries) while still being able to generate a static site if desired.

I think server-side rendering and static site generation are less familiar to many web devs who came up in the React/Vue/Svelte era. The patterns and mental model are just different. In an ideal world we combine both: fast static HTML that works everywhere, with progressive enhancement for interactivity. Astro does this well; Next.js supports it too, though the SSR parts have a learning curve.