Anyone with a brain can figure out that ChatGPT is just more accurate predictive text. "AI" is a massive misnomer, it's just fuzzy pattern recognition. Even LLMs are just predicting what word comes next over and over.
It can be a very useful tool, but it's wholly incapable of doing anything but regurgitating mashups of its training data.
They literally isolate GPU-only power draw in the review, so you know the 4090L is pulling 161 W to the 7900M's 179 W. For 28% more FPS, not 10%
The higher power draw is mostly from the CPU. Efficiency complaints - at least for the CPU - are largely around idle power.