I think you're right. Moon and I exchanged a little mail about it a few years ago. He wrote to tell me he liked Bard, my Dylan-influenced Lisp, and I think he said PLOT wasn't implemented.

Interestingly, he also said he had a solution to class linearization that was superior to C3, but that he couldn't remember the details. I asked for more information, but he said that if he still had the notes they were in the attic or something.

I'd still like to see his solution.

Thanks for pointing out Bard, I'll take a look!

It's dormant right now. I've been busy with other things.

I do plan to start work on an updated version soon. Feel free to mail me at mikel at evins dot net if you want to chat about Bard.