Show users' IP address in logs or AdminFE
Before Pleroma switched entirely to OAuth, usernames were tied to HTTP requests in access logs due to use of the HTTP Authenticate header. Therefore, an administrator could associate users with IP addresses and other information useful in the combat of spam and maintenance of a server.
I understand the original behaviour was an unintended effect of the authentication method used, but @lambadalambda ended up passing the new behaviour off as a "feature" for GDPR compliance and then the concern went entirely dormant throughout 1.x phase of development. The rationale being, that "if I don't need to log this information, nobody else does," if I remember correctly. That rationale is clumsy and insensitive to the needs of other administrators who do not claim to treat browser or TCP/IP stack information as private or confidential, and who use this extra information to detect patterns e.g. with spambots or sockpuppeteers who undoubtedly have patterns in their registration behaviour.
Preferably I would like back the ability to view usernames in access logs, because that's just a matter of perhaps exposing a header to the reverse proxy (at administrator's request). Alternatively I would like to be able to view this information in AdminFE.