Could be related to the 'disappearance' of RakNet, which at some point in the past was *the* go-to networking middleware for games (because it implemented a flexible guaranteed-vs-nonguaranteed and ordered-vs-unordered protocol on top of UDP) until the author sold the library to Facebook and essentially vanished (and Facebook letting the library rot).

RakNet is still somewhat alive: https://github.com/SLikeSoft/SLikeNet