Good article. I am solving the similar problems in my product[1], which purpose is more practical and uses hierarchy (like file system) and keywords to organize and link information.

If you want to resurface them, you can show them in hierarchy(show children, or descendants in any level), search or filter by keywords, sort them by created time, URL, order, or other fields.

Resurfacing from current context can be very complicated, you should create some fields to track your activities, create many routines to handle these information automatically, and create relative UI. These are advanced features based on the current basic features.

[1] https://metaessen.com/