I have a long history with the Civ series. I spent a massive amount of time playing Civ1. My next most played was Civ4 and most of that wasn't the base game. It was a mod that had a very loyal fan base: Fall From Heaven 2 [1]. I have tried a couple of times to get all this to work on a modern PC but I think I'm played out on the game and I never quite get it off the gorund. I have a ton of nostalgia for it though.
Civ5 started the whole hex thing, which I was never excited about. Yes, Civ4 had stacks of doom but Civ5 turned into a puzzle of moving units in order because you could only have one per hex.
Anyway, Civ2 and Civ3 never got as much play from me. I'm a little surprised that people had the same enthusiasm. My memory of these 2 was that they just added a bunch of tedium, like I distinctly remember that tile improvement changed to turning farms into supermarkets. It's been a lot of years so I might be misremembering. Maybe I just dind't give them enough time. Or maybe nothing could capture my initial enthusiasm for the novelty that was Civ1.
Anyway, i'm always happy to see projects like this. Games really do live forever. Like people will invent software for free to keep running them (ie emulators).
The Civ series has kinda defied the usual trend to entshittification. I'm really thinking of SimCity here. It's hard to describe how much EA shit the bed with SimCity %, so much so that it basically launched Cities: Skylines, which itself has had issues with the CS2 launch.
Does Civ3 have a massive fanbase compared to Civ1, Civ2 or Civ4? I really don't know.
[1]: https://forums.civfanatics.com/threads/mod-fall-from-heaven-...