I’d quite like to make a multiplayer card game. Is using Unity’s default networking fine, or is using Photon or something like that a better choice? Since there is less need to stream data instantly and synchronise, then I’m inclined to the default networking. However, which is more suitable and why?
Photon and similar are used when you have hundreds or thousands of users all sharing in the same game experience. Unity networking is better suited (and intended) for smaller numbers of users. (The exact number depends on how much data needs to be synchronised between clients.) I think my advice would be to use Unity networking, and, if that is not a solution for you, then swap it out for something else.