I might take the article seriously if it openly admitted that anti-rust coatings on rebar have been a thing for a century-ish, then talked honestly about which applications this new tech was actually better for.

One clear downside to stainless-coated rebar: During construction, rebar is very commonly welded. Welding stainless ain't just the same tools & techniques as welding conventional rebar. Plus, welding stainless gets you into chromium hazmat territory.