None of those changes address the issue jdlshore is pointing out: self assessed developers productivity increases from LLMs are not a reliable indication of actual productivity increases. It's true that modern LLMs might have less of a negative impact on productivity or increase it, but you won't be able to tell by asking developers if they feel more productive.

(Also, Anthropic released Claude Code in Febuary of 2025, which was near the start of the period the study ran).

Yeah new data would be great, but i feel like these tools are not substantively better and this is becoming the new "its different this time!"