Still, it's not what you're saying. Vibes are present, too, but so are concrete effects like one-off utilities conjured in 2 minutes of prompting instead of 10 minutes of searching or 1 hour of coding, or research questions answered swiftly (and answers verified by me), that I normally wouldn't consider tackling due to up-front effort being greater than my discretionary time. And so on.

This is not vibes, but hard, empirical evidence, immediately retrievable as it just accumulates in the chat history, so I can always go back to check if I wasn't misremembering things.