What? No it isn't. Afterbirth is coming out soon which will really peak people's interests.
Since I got the game on PC, I've beaten it countless times and got the Super Platinum God achievement. It's one of the most addictive games I've ever played. It just keep drawing you in.
I've also been modding the game since it's pretty easy to do so compared to other games. Making a Rick and Morty themed mod
There are a lot of cool mods out to try out. This site has a lot of them.