An important benefit of RSS is that it isn’t influenced by recommendation algorithms. It won’t keep pushing content from a single domain; instead, you can read articles from a wide range of fields. What the article describes feels more like a return to the traditional, linear information-flow model.

when I try to open arch/x86/kernel/entry_64.S. it just says: Failed to load file Failed to fetch file: File: arch/x86/kernel/entry_64.S

maybe its a bug?

The path should be arch/x86/entry/entry_64.S