I wonder if they would share the internal debate where they chose to put the tags in separate files rather than using the tagging built into various filesystems

I wonder if they would share the internal debate where they chose to put the tags in separate files rather than using the tagging built into various filesystems. I'm aware it's not a slam dunk decision either way, but the details would be interesting. If you weren't aware, Windows >= 10, most Linux filesystems, and MacOS all support tagging files. With various caveats, ui, and portability issues.