Having written SPAs in multiple frameworks over the years, I am finally starting to favour the author's perspective.

That said, the one criticism I can lob is toward the assumption that JavaScript / TypeScript will be the only path for SPAs, creating a full-stack monoculture. Web Assembly is on its way to negating this point long term.

I don't think this affects the position on MPAs, but weakens that one particular argument against SPAs.