A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
https://blogs.unity3d.com/es/2018/08/02/evolving-multiplayer-games-beyond-unet/ Unet deprecated. No more unet in 2018.4
I prefer a good network fundation, over good graphics. The graphics can be change easy. Sorry for my bad english.
Is better a dedicated server and master server for survival. Matchmaking system is better for typical deathmatch games. Sorry for my bad english.