> This is an archived project and is no longer supported or updated by Facebook

Yes but you can still use it, or fork it, it's actually a really cool federated logging system.

I hear, from people that would know, that it has a lot of bugs that were fixed internally but never made it into an open-source release.

Scribe is a log aggregation system, it doesn't really do topics/streams or have a good durability/streaming performance story. Its mostly used for aggregating data into a log storage system like DL, or Kafka, or into HDFS.