If you have moved between homes a few times, you’ll notice how you seem to occupy all available space eventually. It’s a good optimization strategy, I think. There’s just no reason to waste time tuning software for optimal efficiency if the users hardware is powerful enough they’d never even notice. Yes, that means software is less efficient than it was, old devices have more trouble running new apps, and doing a bunch of things at once hogs computers down faster—but for the majority of use cases, that is not a concern.