Dan Andreescu, 10/11/2016 16:00:
I don't have as clear a reason for why we store the plain IP in webrequest. I think we could count uniques and all that other stuff with the IP hash. It's a good question, tentative +1 unless I'm forgetting something.
I support any decrease of the storage of plain IP addresses. See also https://www.mediawiki.org/wiki/Thread:Talk:Requests_for_comment/Structured_logging/IP_address_and_other_personal_identifying_information for more references.
Nemo