Looking at a few random questions on Parenting, I noticed that many one-question users are never seen later than a few minutes after their questions were posted (confusingly, due to how the "seen" metric works, some are last seen before their question was posted).
On Science Fiction & Fantasy, the same thing happens on a huge number of story-identification questions—a user posts one question and is never seen again.
I know that Stack Exchange has a lot of data on users for SEDE queries, ads, etc.
Is there any data on how many users never visit their single question ever again, including non-logged-in visits from their IP addresses?