* A PT may be superseded by another. For example, obfs4 superseded scramblesuit.
* The maintainer of a PT may no longer be available. This was the case for FTE.
* Eventually we should have a process to make this decision.
== The retiring process ==
1. Inform the community by sending an email to tor-talk@. Also inform the relay operator community by sending an email to tor-relays@. This will give operators a chance to shut down retired transports.
2. Update Tor Browser. Also don't forget to update the list of default bridges.
3. Update BridgeDB after Tor Browser.
4. Update our documentation.
== Where and how to retire pluggable transports ==