This deserves a bit of clarification: ROP is an application of threaded code technique. Conventional Forth (proto-father of stack-based/concatenative languages,

This deserves a bit of clarification: ROP is an application of threaded code technique. Conventional Forth (proto-father of stack-based/concatenative languages, alongside with Joy) is based on indirect-threaded code (ITC), so the connection between ROP and stack-based programming is rather indirect (pun intended). For anyone interested, Book by Loeliger [1] and "Moving Forth" series [2] are essential readings on this topic. [1]: https://archive.org/details/R.G.LoeligerThreadedInterpretiveLanguagesTheirDesignAndImplementationByteBooks1981 https://archive.org/details/R.G.LoeligerThreadedInterpretive... [2]: https://www.bradrodriguez.com/papers/ https://www.bradrodriguez.com/papers/