Not sure what has changed but now it’s even worse. Both are still different but given that the baseURL is /tech the links that are just <a href="{{ .article.RelPermalink }}"> are now broken as they resolve to “/tech/tech”.
Further investigations suggest that .RelPermalink does not change with relativeURLs: true but instead that common attributes (like hrefs) get changed in retrospect. Which makes getting the proper .RelPermalink in other places impossible. I haven’t checked the sources yet - but that’s what it looks like.
If that’s really true - that would be pretty bad.