Higher-order Virtual Machine 2 (HVM2) is a massively parallel Interaction Combinator evaluator. By compiling programs from high-level languages (such as Python and Haskell) to HVM, one can run these languages directly on massively parallel hardware, like GPUs, with near-ideal speedup. HVM2 is the successor to HVM1, a 2022 prototype of this concept. Compared to its predecessor, HVM2 is simpler, fas