Delay based congestion control is the basis of LEDBAT (RFC6817) as used by BitTorrent over UDP. The claimed advantage of LEDBAT is that it is submissive to TCP,

Delay based congestion control is the basis of LEDBAT (RFC6817) as used by BitTorrent over UDP. The claimed advantage of LEDBAT is that it is submissive to TCP, instead of dominating like BBR. This allows BitTorrent to run in the background without hurting your videocalls. What is different about BBR that makes it dominate while LEDBAT subsides?