I hope that this improves their false-positive rate for identifying spam. If a message is borderline, I wouldn't mind it receiving a "low priority" tag instead

I hope that this improves their false-positive rate for identifying spam. If a message is borderline, I wouldn't mind it receiving a "low priority" tag instead of being auto-junked. My personal messages are usually classified correctly, but I need explicit filters to save Git and Boost mailing list messages from the spam folder. As a result, actual spam messages that were correctly labelled "spam" are archived instead of deleted, and I still waste time deleting scams and shams.