What this approach doesn't really consider is that the same contents may appear multiple times on a site: - actual post - teaser on the front page - RSS feed

What this approach doesn't really consider is that the same contents may appear multiple times on a site: - actual post - teaser on the front page - RSS feed - search index - title in multiple "tag" pages - title in sitemap - title in a paged list etc. pp. Sure, you can maintain all that manually, but it's so much easier using an SSG like Hugo.