@Jellyfoosh
Interesting piece here on the inner working of the game, good read keep them coming
@Hartge
If they rely on the same technic as mudrunner the server is you, you are hosting or your friend so as long as you have a decent connection and a decent hardware it should be fine, but if you starting to have an increase in packet loss or hardware problem it will impact the other person at some level.
What they can do to mitigate that is the ability to migrate hosting on an other player who is deemed more reliable and the ongoing game is not crashed and the person who droped can join again.