I don't think AI is going to destroy humanity.
I don't even think AI is going to destroy (much) paid employment, in the end.
But I increasingly strongly suspect that it is going to destroy the internet – this incredible network-of-networks – at least in any recognisable form.
The whole thing is too obviously riddled with security holes that we only got away with until now because no one was looking all that hard.
Now a huge amount of computer power is looking very hard. 24/7. Relentlessly.