Web-design: "Paging" versus "Dynamic content loading" [duplicate]

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I apologize for badly formed Title, but I do not know the actual term for the latter case where content loads and expands the page downwards.

This seems to be the trend today, and it is a pain to follow such trend. I personally prefer paging in ALL cases. If I have to refresh or revisit a site to find a certain item, I simply can not, because of how the content is loaded on to the pages these days.

Even if a search engine points me to a page where the information exists, I have to crawl through the content to find it.

But with paging, I simply jumped straight on to the page where the information is.

Why do we keep taking steps backwards with design trends? What is the point behind this style? Only reason I could think of is that I don't have to reload the whole page with this "dynamic content loading", but that's it..