Seems flow under radar, now its official part of server 2019.
https://blogs.technet.microsoft.com/networking/2018/07/25/ledbat/
https://datatracker.ietf.org/meeting/100/materials/slides-100-iccrg-ledbat-low-priority-tcp-congestion-control-in-windows
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On Fri, 10 Aug 2018, Rosen Penev wrote:
My question is not really how to fix it. I already know that. I just
got the feeling that bypassing parts of the linux network stack would
result in less buffering.
On the OpenWrt configuration page for the "software flow offload":
"Experimental feature