Northern Light
Superstar
You mean the kind of balcony that provides the best kind of large, livable, outdoor, space for residents?
I favour balconies that functional for residents (if you're going to have them.), but I don't think that's about endless length. It's more about width/depth actually. You need space to put a proper dining table out (seats 4) and still be able to get past it to water the plants on the other side!
A 10M long Balcony that's standard width, ~1.2M isn't all that functional.
But a 5M long Balcony at a depth of 2M is quite functional.