In general, I assume this information to be of interest in the respective context, but there are some current use cases too:
Signups
Currently, I am monitoring user registrations as part of a marketing campaign. I have noticed a lot of fake accounts in recent weeks, for which I am temporarily freezing the Trust Level if the users have certain email domains. The additional information help keep track of what is going on.
New Contributors
Here, the context of the new contribution is particularly relevant, especially for support requests, as it helps build a picture of the user. For example, has the user spent some time exploring the community, or did they sign up and immediately post their question?
Accepted Solutions
To understand which user was helped (not just who provided the help) and how long it took for the topic to be marked as solved.
DAU / MAU
To better understand which users contribute to the community’s stickiness.