There is a trend in UX towards products so simple (by cutting features) that any user can immediately instantly pick it up without a learning curve.

It's what prompted Don Norman to write the article around 2007 titled "Simplicity is not the Answer" - http://www.jnd.org/dn.mss/simplicity_is_not_th.html (quoted in the blog post) and a book "Living with Complexity" - http://www.jnd.org/books/living-with-complexity.html