You can use different TCP congestion control algorithms, not just cubic. BBR2 has no issues with high RTT even with packet loss and is fair to other TCP streams

You can use different TCP congestion control algorithms, not just cubic. BBR2 has no issues with high RTT even with packet loss and is fair to other TCP streams. It serves 25Mbps stream in real time to users in Japan and the US from a data-centre in Europe with no issues.