Fair question! I've wondered that myself, there is always the possibility that the productivity gain is in my head. I'm not AI pilled, if these things disappeared tommorow I would probably just shrug, I'm just trying to keep up to date.

Where I find it makes me faster is in dealing with writing low value code that's repetitive, which I might normally procrastinate. Like, the thing I'm working on is a data editor that generates a lot of fields, so having it churn out a lot of samey react code is useful to me in that context. There's already an obvious pattern for the tools to follow.

I also find it useful for "rubber ducking". Bouncing ideas I might previously have bugged a colleague about.

By faster I'm not suggesting a fanciful number for me. Maybe like 10 to 20 percent if I were to guess.