I would say that the existential threats are: - biosecurity risks (i.e., AI-assisted development of very effective biological weapons) - a future where humanity becomes a sort of a "pet species" of an artificial superintelligence (humanity would not go extinct in this scenario, but the loss of agency and meaning would be such that I consider it an existential threat)

I'm worried about other risks that I would not define "existential" but are still likely to cause great harm to humans: - large-scale AI-powered disinformation campaigns that could undermine our democracies - the potential of AI for pervasive, automated surveillance, which could lead to an inescapable authoritarian future - autonomous weapons (could become an "existential risk" if at some point we'll allow AI to control also nuclear weapons) - cyberattacks to critical infrastructures - the consequences of widespread unemployment among white-collar workers: social unrest, rampant inequalities... - the consequences of prolonged cognitive offloading on our minds

On a more personal level I would say that AI could automate away some aspects of my job that I deeply enjoy. It's personal, but I think that many people feel the same, and this makes them suffer at various degrees. I'm also saddened by the widespread usage of AI to write texts of any kind, even personal communications, as I feel that the human behind those texts disappears (I acknowledge that, compared to all the other things, this point is minor).