As a codeveloper of a different game, as well as a fan of over 100 adult VNs in development, I can attest to both sides of the coin:
As a "player", I want it all ASAP.
As a "developer", I know that for every 3 minutes of game time, most developers spend 3-5 DAYS working on getting it just right.
As a "player", I know the frustration of seeing updates that take a long time and/or contain very little actual content.
As a "developer", I know that some of us have tons of things to do - outside the world of game development.
It's like a film project. We love the finished movie, but - like some adaptations or sequels to awesome stuff we're fans of - while some movies can be written, script approved, cast, filmed, and edited for release within year, 75% of all films released this year have been in development for over 10 years. That's 2 hours of content (on average) taking 10 years to get finished.
So patience is key, even in this world of "gotta get it all, gotta have it right now" impatience.