That's a really interesting example, I hope he enjoyed himself! I also like to point out to this "no autism in the past!" That a lot of the obviousness of autism is only obvious in contrast to modern Western culture norms.

No eye contact? That's okay, it's rude. Completely silent child? You're blessed and the kid is well-behaved. Kid only interested in one single thing? Great, that's their job now. Adult child still lives with you? As it should be. No loud noises, different foods, bright lights, strangers, overwhelming activities? Welcome to rural poverty.