[userbinator]

Maybe the interactions aren't actually the issue because the features are quite orthogonal and independent of each other, and the complexity is really the natural result of the interactions between them. If I wanted to write a C++ compiler I'd probably start by adding features in this order:

    - Member functions in structures; constructors; destructors
    - Single inheritance
    - Virtual functions
    - Exceptions
    - Multiple inheritance
    - Virtual inheritance
    - Templates

There's definitely more I haven't listed, but the first few don't seem too difficult...