[vector_spaces]

Yes, there is a pervasive anxiety around strangers and impromptu socializing among younger millennials and Gen Z particularly in North America and parts of Europe, and across age groups in certain subcultures. There are lots of causes for this, but this phenomenon is neither as entrenched nor as universal as you might think and the dangers are basically infinitesimal (zero for all intents and purposes). If you are respectful and mindful of how you engage, the overwhelming majority of people will at worst ignore you. Which sucks, yes, but more than likely they won't even do that, i.e. they'll probably reciprocate

I agree re the pretext scenarios disappearing and re neurodivergence adding extra challenges.

RE the former: there are lots more of these pretext scenarios than you might realize

RE the latter, I realize it's not your point but for what it's worth, you won't really be able to tell in most cases that someone on the street or wherever is or isn't nd. Meaning: there's a good chance that the person you are talking to is nd themselves. Lots of us are pros at masking

In general though i would say to be careful when generalizing about human behavior in a way that causes you to implement and enforce rules / limitations on your own behavior in response. This is unavoidable, right? And yes, there's often an nd component to this. But especially as you get older, these can start to calcify and limit you in increasingly destructive ways