I think the "once in a generation" statement was based on how things currently are at the time. So, if there wasn't any drastic changes to the entire political

I think the "once in a generation" statement was based on how things currently are at the time. So, if there wasn't any drastic changes to the entire political and economical landscape in those 8 years, then there wouldn't be another vote. But since there been at least one major shift in the very country Scotland exists in, I think it's fair to reassess how people feel about independence via a referendum.