The project manager wouldn’t have a say in battery life, as it’s really just because of the ARM chip.
And I don’t think anyone thinks Copilot is good in its current form, AI hype or not. It feels like a web app with no real control over the machine.
It’s a common misconception but ARM isn’t inherently better at battery life than x86 though. It’s more that Qualcomm’s designs are as compared to the companies on the market that produce x86 hardware.
TIL, I did some research because of your comment and indeed, the difference in their use cases is mostly a market thing, not so much a limitation of each one. This answer is particularly good at explaining that.