In the days of Windows 3.1, C was the standard. When C++ hit the developer market and later became ANSI standard, it was the new hotness. It popularized the OOP acronym and some of the basic design patterns using polymorphism.
Now, with the greater acceptance of low-barrier-to-entry managed platforms, like C#/.NET, there's less of a reason to use C++. So much of the developer base will have a choice and let's be honest: C++ is a bear to learn for a novice. With C#, you can just run with it.
That leaves really only the platforms that NEED C++ and the die-hard C++ evangelists to continue practicing the art. This is the community that needs and wants all the layers of abstraction that is considered "Modern C++".
So yes, I believe "Modern C++", as you state it, is becoming more prevalent. Albeit, it's prevalent with a different audience than has used it in the past.
