Yes that part must be a joke! I’ve seen dozens of attempts to make S-Exp “better” even the original M-Exp. I also did some experiments myself. But at the end,

Yes that part must be a joke! I’ve seen dozens of attempts to make S-Exp “better” even the original M-Exp. I also did some experiments myself. But at the end, I come back to goo’ol s-exp. Seems to be a maximum (or minimum) found just perchance.