Guido van Rossum wrote:
An unfortunate issue however is that many projects seem to make a hobby of hacking bytecode. All those projects would have to be totally rewritten in order to support the new wordcode format
Maybe this argues for having an assembly-language-like intermediate form between the AST and the actual code used by the interpreter? Done properly it could make things easier for bytecode-hacking projects as well as providing some insulation from implementation details.