In my personal experience, BBR with SACK works pretty well even on fairly bad connections. It still slows way down but not as badly as others like Cubic. That

In my personal experience, BBR with SACK works pretty well even on fairly bad connections. It still slows way down but not as badly as others like Cubic. That was with BitTorrent uploads of Linux ISOs to Taiwan. (Why do they download so many copies of Ubuntu 14.04 LTS?) But since I didn't do controlled tests of multiple congestion types I could just be seeing things.