Ok, very few games also provoke that reaction in me. The amount of quality-loss must not be too high though.if I really like a character I wouldn't mind if it keept on going even if the quality did suffer , as I just want more interactions with said character and couldn't care less for a ending haha.
But many games do not offer one or both of the necessary ingredients for such a game: a very likable MC and a good story.
If someone would be able to write an adult VN like The Lord Of The Rings or Star Trek Voyager, let him lenghten his game ad infinum, but most plots are so poorly written that it would be better for a shorter game.
Yeah, in theory, I would not need any ending at all. But if Bobby has decided to keep this game rather short because he feels it will keep the quality higher then I thank him for this.