It's clarified in the next line.
> "The point is, don’t split your game protocol across UDP and TCP."
There is always going to be data transmitted other than the game protocol. Most likely that is going to be limited and not at the same time as real time data is being transmitted.
There is always going to be data transmitted other than the game protocol. Most likely that is going to be limited and not at the same time as real time data is being transmitted.