Won't Get Fooled Again has a section that's just the first guitar sustain and can't be leveled up at all. I wonder if there are any cases like that that make gold stars literally impossible?
http://www.grenadetree.com/
I wouldn't be surprised. I accept a challenge, but goodness gold stars are hard. I'd be more willing to accept that if I didn't feel like I was being ripped off on any song that isn't 100% notes 100% of the time.
I like challenging gold-star cutoffs, but the second that it reaches the point where you have to learn the song specifically to get gold stars is the point where I lose interest. Gold stars, for me, is a sign of a really good sightread, not an accomplishment after repetitive practice.
meh
I would be very surprised considering how the right combination of power-ups, Blitz bonus and OD trigger timing can really get songs to GS early but I suppose it's possible.
They simply could not have playtested every single song for GSability.
I am sure sooner than later someone will declare something un-GSable and them we will see.
This is similar to some cases in regular Rock Band. Some drum-light songs are impossible to even five-star
What's weird about the game mechanics for RBB, though, is that it is not linear. Your first little mistake costs a lot more than your second, or third, etc, because your multiplier keeps increasing. So it's kind of like... if you get gold stars, you did well, but if you mess up at all, you will just barely get five stars, if that.
meh
They tested every song for GNFabilty. Since every song failed, they stopped using it.