In general I feel a programmable packet pacing approach is the right
way forward for the internet as a whole.
It lends itself more easily and accurately to offloading in an age
where it is difficult to do anything sane within a ms on the host
cpu, especially in virtualized environments, in the enormous dynamic
range of kbits/ms to gbits/ms between host an potential recipient [1]
So considerations about what is easier to offload moving forward vs
central cpu costs should be in this conversation.
[1] I'm kind of on a campaign to get people to stop thinking about
mbits/sec and about intervals well below human perception, thus,
gbits/ms - or packets/ns!