In my short experience this is mostly due to OOP falling out of style, being replaced by a more hybrid approach that combines a lot of functional programming, p

In my short experience this is mostly due to OOP falling out of style, being replaced by a more hybrid approach that combines a lot of functional programming, procedural programming, and OOP - that, together with newer languages providing alternatives for inheritance (traits/concepts), and such, you rarely find yourself needing much more than visitor- and factory pattern.