It has been decided to retire the Tor relay (currently running on torrelay1001.wikimedia.org).
It's an outlier in our technical infrastructure and there is a range of issues with it, including technical debt (such as a lack of data center redundancy, inadequate observability support, need for improved hardening/isolation et. al.) that we can't address with our current resources/staffing.
Overall our role in the Tor network is fairly small, which doesn't warrant to increase or extend our current participation: We operate just one relatively small exit node (of the ~ 6000 nodes in the total network) with a typical average of 25-30 MB/s traffic (out of the ~ 200 GB/s of the typical average bandwidth of the Tor network at large).
This task tracks the removal of the service and the later decommission/repurpose of the hardware.