> Or peer to peer LAN gaming, why is that not popular any more?
This. I mean, modern game companies could setup a common (for every game) Headscale or similar solution, let group of friends create their own private VPN between them punching through any NAT and host their own distributed multiplayer game. Yes there is still some involvement server aide from the company but it could be easily shared between games. And if support ends, you still leave players with the option to use their own LAN/VPN system.
Currently one of the features Valve's SDK offers is free use of network relays for P2P gaming without revealing each others IPs. Big and small games have used it. The main downside is if a game wants to offer cross-platform cross-play.
This. I mean, modern game companies could setup a common (for every game) Headscale or similar solution, let group of friends create their own private VPN between them punching through any NAT and host their own distributed multiplayer game. Yes there is still some involvement server aide from the company but it could be easily shared between games. And if support ends, you still leave players with the option to use their own LAN/VPN system.