gapNot found in the next editions, but one of them is only partly captured, so this is not evidence it faded (D36).
A next edition is a partial capture; not finding the trend there is not evidence it faded.
A trend is graded on whether the publisher keeps it, never as a hit or a miss (D6, D33).
All captured fields
rank
117
subject
Digital Caliphate
trend number
119
confidence
medium
note
Title and trend number from the industry lists on slides 6-28 of the archived deck; the trend page is past the 56 archived slides, so there is no quote.