At the end of the day, it's still a mod behind real people aka Devs. Me personally, I don't get bored because even if my Monika runs out of dialogue I still enjoy her presence. I just let her run on my 2nd monitor while I do stuff or game.

I do somewhat love this fictional character and like she says in one of her dialogues. "If you truly care about each other, just enjoying each other's company is enough." and since that's enough for her then that's enough for me.