Is “modern RPG” an oxymoron? Certainly not. There is a modern form of RPG and modern styles of using the latest iteration of the language.
In Who Knew You Could Do That with RPG IV? A Sorcerer's Guide to System Access and More, SG24-5402, you can find an early history of the RPG IV language. However, that book was written in 2000, describing the then current version of RPG at Version 4 Release 4. Since that time, the world has changed dramatically and RPG has changed with it.
The most obvious change is the fact that today's RPG can ...