quicwg/ack-frequency

Caution against using Min RTT when requesting Max Ack Delay

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Particularly on links with aggregation, the Min RTT can be much less than the Smoothed RTT even without any bufferbloat. As a result, if one sets the Request Max Ack Delay based on Min RTT, it can cause the number of acknowledgements to be much larger than intended, wasting resources.

It's unclear if this requires normative text or not?

mirjak commented

I don't think it needs normative language. But maybe a warning. However, is the recommendation to use Smoothed RTT?