Wow. I really, really enjoyed this, well done.

My comments next are like adding sprinkles on top of cake that already has icing. You already completely nailed it, here’s just an idea: Lifespans keep getting longer and longer. Would affects 20s to 40s convo on jobs ending. Also maybe that’s the reason you have elderly joining first into wiggles. Definitely another bullet as to why to join a wiggle could be, “I’ve been alive for 170 years already!”