OK, so in the last post, I was getting into some channel capability flags, and how they impact handling of lost packets. The main conclusion for the purposes of that post was that we need some kind of sequence numbering in every packet, unless we just so happen to switch all reliability flags off. Saving bits is a noble goal to be sure, especially when you have WiFi induced low MTU on the path. But I’m not sure that the extra branch you have to take for one of currently nine cases is worth ...