There is no inheritance here, just a function table as it is often used in C libraries.

> OO programming is, at heart, just one approach to organizing functions and data

Which equally applies to any programming paradigm.

> such as simulation (thus Simula)

Simula 67 - the world's first OO programming language - was explicitly conceived general purpose, in contrast to Simula I, which was not yet OO (though it already had active objects) and dedicated to simulation.