A Wind Named Amnesia (1990) IMDb
A mysterious wind wipes out all memories from humanity’s minds, reducing them to wordless barbarians. Unguided technology becomes a threat. A serenely mysterious woman travels across the US alongside the main character. She ponders humanity in its natural form, and wonders whether she ought to restore their memories or not.
Philosophical post-apocalyptic science fiction. Entertaining premise. Bad music and misplaced, poorly executed action. Themes are interesting, but badly presented. The technological inventions meant to illustrate philosophical points do not make any sense. It would have been more relevant with plausible technology, but then it would also have been more similar to the threat of induced stupidity in Way Station (1963).
References here: Japan Sinks: 2020 (2020).