No, RC is GC. Most people think of Python as GCed language, and it uses mostly RC. Any runtime that uses mark & sweep today may elect to use RC for some subse

No, RC is GC. Most people think of Python as GCed language, and it uses mostly RC. Any runtime that uses mark & sweep today may elect to use RC for some subset of the heap at some point in a future design, if that makes more sense. The mix of marking GC vs refcounting GC shouldn't affect the semantics of the program.