Let's imagine that Joomla can:
- Recognize visitors by their behaviour and offer them different content according to their interests. Each one type could get something else in feeds, etc.
- Recognize customers by browser language settings, etc. It might detect culture and so on... then serve the content according to your settings.
- Recognize which pages aren't interesting for anyone, then prioritize to show in blog posts/menu/feeds something more successful.
- Headers, colours, and design testing in general. For example, you might choose different 5 colours and headers, then Joomla might try all of them for a period of time, count (make statistics) how it works, and then make a statistically based decision which one is the best for the conversion rate and use it forever. The title and also H1 for this topic include: "Predictive analytics in Joomla". Let's say that I wanna try 5 different titles and select that one which drives as most people from Google search results or the category menu, the biggest amount of clicks. However, do we have to test e.g. 100 articles, 5 times per each and make statistics on our own? I think that none can. But Joomla could be doing it and it's not so hard to make it done.