This writeup by @nprofile1q... about actually measuring "time saving" by using AI is great, it's so nice to see some actually numbers put to some of the vibes at least, turns out there is a reason these numbers aren't shared widely.
https://pivot-to-ai.com/2026/01/13/if-ai-coding-is-so-good-where-are-the-performance-numbers/
https://pivot-to-ai.com/2026/01/13/if-ai-coding-is-so-good-where-are-the-performance-numbers/