To an extent, there's a limit for air travel, generally speaking as they can be dangerous. The m1/m2 are just killer in terms of lifetime and usage for general reading/browsing/email.. and still very long for even content viewing. Most people aren't rapidly draining their batteries, so the longevity gets to be a bit better overall.

AMD is getting pretty close and the perf:watt on the coming generation(s) for laptops (including integrated gpu) look to be really impressive to say the least...