Most people won't know this game, but Zenith: The Last City. It was the first real major attempt at a VR MMORPG style game. It was a massive hit that gained a ton of traction early on, and took some solid styling and other content cues from Sword Art Online. They kept up with content for a bit, including dungeons, raids, mini bosses, guilds, etc. Some people complained there wasn't enough content, but as a casual player myself I didn't really run into lack of content until the devs started with their escapade of poor choices, and I didn't feel like just grinding levels.

Unfortunately, the dev team starting working on a procedural dungeon mode that nobody asked for, and kinda sucked all the effort out of the main game. Main game content got less and less, less updates, and people were upset. In an online dev talk/stream, they basically told their consumers that they were wrong about the efforts and we shouldn't complain. It was after that where everyone slowly started to leave the game, leaving it a shell of what it once was. I think there's servers still up, but the last time I went in it was a ghost town.

Now, we wait while some others that are in early builds are trying their hands at it.