Comment by bullen

TcpAckFrequency and net.ipv4.tcp_delack_min but they don't do exactly what we need:

We need to be able to set it to -1 to tell the OS that no acks should be used at all, effectively turning that socket into UDP but with a TCP API!

That way we only have one protocol for ALL internet traffic.

I made a RFC about this a decade ago that was ignored.