So if there is no extra-special need, I won't do house-keeping on the
raw logs.
Just to clarify, we're not purging in this case just to do housekeeping on our schemas. We're purging the data in this case because that is what we agreed to with Legal. These schemas depended on setting a unique token for anonymous editors and then tracking them further (including whether they registered an account). Like CheckUser logs, this is something we needed to answer a question, but which we would rather not keep beyond 90 days, and which we do not normally collect on the site.
Our team has never asked for a purge before, and I would never do it as a matter of routine or if I didn't think it was a priority. I understand that time is the most precious thing we all have, perhaps especially so at work. ;-) I also let Kevin know months ago we would need some help doing this from Analytics.