I felt this way about Back 4 Blood. The game came out, it was genuinely fun and had a good amount of content, and they added DLC that expanded the game while also not ruining things for anyone who hasn’t installed it.
But there was an unending cry from gamers that it was getting “abandoned”. You can still gather 4 players, or fewer with bots, and have a good time. It’s a different appeal from Left 4 Dead with the card system, and that was fine to me.