Sure, we're all more productive now, but how much of that is because we leverage AI on top of the intelligence we gained from all of that manual work? Who is to say that in 36 months you're not a worse developer over all because that systems knowledge starts to atrophy too?
This isn't me saying you shouldn't use AI. I use it all of the time to do useful side tasks like to setup GitHub Workflows while I write a feature, or with my agent on a VPS to do internet tasks for me. It's nice to have a little synthesized intelligence.
What isn't nice is to supplement your own intelligence. I think the gains are in the work there--similar to how you can be absolutely ripped from taking steroids while destroying your body. Often it's the shortcuts that are the most treacherous path.