Oh yes, I remember being outraged when I made the three price comparisons to the first time I lived in Berlin in 2003. Back then the cost of a Döner was €2 (versus €6 today), about the same as a public transport ticket (versus €3 today), or a beer at a Späti (the only thing that has not had a price increase whatsoever!).
I can only imagine what Berlin will look like when the cool young people move away: the only ones left will be the types who have either been living there since the 90s, and thus still benefit from unrealistically low rent, or the ones who have bought in late due to the coolness factor. In either case, they would be an aging population, clinging on desperately to a fading memory of alternative culture. This would probably manifest itself in form of geriatrics full of tattoos and piercings, going to nostalgia raves with their wheelchairs and walking frames.