I try to think about other truly revolutionary things.
Was there evidence that GUIs would dramatically increase productivity / accessibility at first? I guess probably not. But the first time you used one, you would understand its value on some kind of intuitive level.
Having the ability to start OpenCode, give it an issue, add a little extra context, and have the issue completed without writing a single line of code?
The confidence of being able to dive into an unknown codebase and becoming productive immediately?
It's obvious there's something to this even if we can't quantify it yet. The wildly optimistic takes end with developers completely eliminated, but the wildly pessimistic ones - if clear eyed - should still acknowledge that this is a massive leap in capabilities and our field is changed forever.