> There are a lot of problems for which I can't see any concrete benefit to using React. Those are things like blogs, shopping-cart websites, mostly-CRUD-and-forms websites.
And the thing is, this still comprises an awful lot of the web. If I can produce a web site with Lektor or Hugo or some other sophisticated static site builder, it's hard to see how React is going to bring anything to the table that either makes that web site easier for me to maintain or provides a better experience for that web site's users. If you introduce some dynamic elements to the web site -- well, just what are those elements? Ad banners? A simple image carousel?
And I think that's really the argument being made here -- use the right tool for the right job. If all you have is React, everything look likes like an SPA, but that doesn't mean that it is.