ECN is a far more efficient TCP congestion control mechanism that was incorporated in to the TCP standards in 2001 and it was meant to replace Jacobson's AIMD method.

[Navek]’s recent video goes over TCP congestion control, the solution to this problem which allows our much larger modern internet to work. In a 1987 paper, ...

Random Early Detection (RED): An AQM strategy that monitors average queue size and drops packets probabilistically to signal endpoints to reduce transmission rates before severe congestion occurs.