The hard part isn't having a few people design something powersaving, it's having the whole set of distro software working together for power savings.

That's the incredibly hard part - not having some random package run a cron job every 10 seconds because it was easier for the developer to do it.

And Linux developers get incredibly angry - keeping grudges for decades - if you try to add systems that enforce power saving behavior necessary for devices to last a whole day.

This is where the difference between Android/iOS and Linux distros lies in practice. And people are still - even on HN - incredibly angry at Android for not letting them destroy the battery anymore.