There has never been a better metaphor than calling the empty husks of cicada nymphs zerglings. Chef's kiss. No notes. Beautiful. I loved this episode. Cicadas turned out even more fascinating than I thought they were. Great Patreon question/answer too!
Maybe I'm red queen-brained but I thought the prime number year cycle was due to other enemies such as parasites, but I like the other outside-the-box hypotheses you gave here
54:00 insects peeing is not something I've ever thought about before. But I will be thinking a lot about it now, now that you point out the physics of waste disposal are very nontrivial at such sizes.