system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do so many games now not have local LAN? Is it hard to implement?
gpt
At least a few games have removed LAN functionality as a means of DRM - when the publisher controls the servers they control what clients are allowed to play multiplayer.

Also you may be perceiving a general shift towards MMO-style games which your average consumer could not hope to host themselves.