This feature has very little to do with mass adoption. However I did see someone post link to their article in Post.News within Mastodon because Post.News supports longer form articles with formatting as well as short form content.

For regular people it's much more important how you present things in UI. If you show long form content in a short form feed so that it jams the timeline, it's obviously bad. But if you show long form content behind an extra click it doesn't jam the timeline, and suddenly it's more acceptable like in Post.News.