I think, on the whole, as current-production routers have migrated away from software-based forwarding in recent years into hardware planes, as
ACK. Good Internet is almost an emergent feature, not something we really designed for. The main remaining problems are congested peerings, which is a silly political problem which ends up hurting customers and not helping anyone. No one needs strict priority queues anymore, which was absolutely needed at one point in time. We are not in a market which cares about QoS, yet our BE is globally <200us max jitter on a typical day and AF is <50us. Average jitter being under 10us. So if I'd have HW timestamping NTP server and client, I could synchronise clocks over IP transit cross continents to ten microsecond accuracy. I think this is pretty crazy. And I'm sure anyone who measures, measures similar numbers, this would have sounded scifi 20 years ago. As a context, Zoom recommends a jitter of 40ms or better, or 40000us. -- ++ytti