I doubt the CPU itself will be that much trouble, it's still mostly an ARM CPU.
Power draw problems usually arise because the drivers are half baked and don't know how to turn the peripherals off when they're not being used.
It might not be native power efficiency, but if non-M1 Mac linux experience is anything to go by then it's still plausible that it can run circles around x86 based laptops with good Linux driver support.