The article itself acknowledges that the headline is bullshit:

> The change isn't about the core operating system becoming resource-hungry. Instead, it reflects the way people use computers today—multiple browser tabs, web apps, and multitasking workflows

Basically the change reflects the fact that, at this level of analysis (how much RAM do I need in my consumer PC), the OS is irrelevant these days. If you use a web browser then that will dominate your resource requirements and there's nothing Linux can do about that.