There's an interesting dichotomy which seems to be arising here. It's almost as if he's defining a folgezettel note in opposition to orphaned notes, most often seen in digital settings when importing lots of "stuff" but which Doto indicates can happen in analog systems as well.

Orphaned notes in an analog space, however are still linked by proximity even though they're not as densely linked (even from a mathematical topology perspective.)

There is a difference between the sorts of links one might make when placing an idea into an (analog) zettelkasten. A folgezettel link is more valuable than a simple tag/category link because it places an idea into a more specific neighborhood than any handful of tags. This is one of the benefits of a Luhmann-artig ZK system over a more traditional commonplace one, particularly when the work is done up front instead of being punted to a later time.

For those with a 1A2B3Z linking system (versus a pure decimal system), it may be more difficult to insert a card before other cards rather than after them because of the potential gymnastics of numbering and the natural tendency to put things into a continuing linear order.

See also: - https://hypothes.is/a/ToqCPq1bEe2Q0b88j4whwQ - https://hyp.is/WtB2AqmlEe2wvCsB5ZyL5A/docdrop.org/download_annotation_doc/Introduction-to-Luhmanns-Zette---Ludecke-Daniel-h4nh8.pdf

Should You Have One Zettelkasten or Many?<br /> by Christian Tietze

reply to u/Turbulent-Focus-1389 at https://www.reddit.com/r/antinet/comments/112wup1/beginner_question/

I'd recommend you do your best to stay away from rigid category-like classifications and see what develops. For specifics see: https://boffosocko.com/2023/01/19/on-the-interdisciplinarity-of-zettelkasten-card-numbering-topical-headings-and-indices/

If it's easier to conceptualize, think of it all like a map which may have place names, but also has numerical coordinates. Sometimes a specific name like Richard Macksey's house is useful, but other times thinking about a specific coordinate and the general neighborhoods around them will be far more useful in your community development plan. A religion-only neighborhood without religious activities, religious food, religious organization or communication will be a a sad one indeed. If you segregate your communities, they're likely not to be very happy places for co-mingling of ideas and the potential resultant creativity you'll get out of them.

Bob Doto also suggests a similar philosophy in some of his work, particularly with respect to folgezettel: https://writing.bobdoto.computer/zettelkasten/

I'll note that this is an incredibly hard thing to do at the start, but it's one which you may very well wish you had done from the beginning.