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@evan removals aren't *uncommon* though, and each removal shifts the index of every item. reverse chron doesn't solve this. actually it makes it worse! you need forward chron append-only -- this is the only way to ensure old pages stay consistent. your collection basically becomes a changelog. one downside is that removed items leave behind a record that they once were included. you get this issue with any append-only structure unless you rewrite history (making it no longer append only)