This occurred to me today, and it’s suddenly put it all in place:
- Tags are best thought of as “specially designated search terms”. You can search for “recommended” but then you get every occurrence of that word. If you search for
#recommended, then you only get the tags. But it helps me to think of the question “Do I want this to be a tag rather than a bidirectionally linked word/phrase?” as equivalent to the question: “Do I want to be able to quickly see the search results for this?”