Respectfully, I don't understand this. They never needed Next.js for a static blog.
This is like writing a post about how I didn't need a Ferrari to commute to work and I saved money by taking the bus.
Next.js supports fully static export, so they should have went with that.
I run a dynamic website on nextjs static export - landingpages and docs are fully static, login and user dashboard use REST calls to a non-nextjs backend. Blazing fast, no nodejs or SSR in production.
It's more like they realised they can also commute by bike or foot never realizing before that that was even an option
I think we should blame the elders for teaching people new to the trade wrong.
Because "heavyweight SPA for a static blog" isn't exactly a rare problem.