I don't think it's fair to equate running JS that can change the rendered output with the archive server actually changing the HTML it sends back.
I agree, JS is much worse. Because anyone could create an "untrustworthy" page on archive.org, no hack or admin assistance is required.
I agree, JS is much worse. Because anyone could create an "untrustworthy" page on archive.org, no hack or admin assistance is required.