Good points, thanks
Im not saying they dont matter but speaking to older voters who remember 79, one said back then it was mentioned about younger voters after the result. This is just my opinion but I think any reliance on demographics is risky along with any reliance on EU. You got to be able to sell independence and show that Scotland can stand on its own 2 feet outside of uk and eu.
These points Demographics/EU are positives that shouldnt be ignored and can be included but relying on them as major sources ignores the fact of how quickly things can turn either younger voters for whatever reason moving away from indy (seems unlikely at moment but can happen over time depending on other issues) and people not being so keen on EU (another EU financial crisis for example unlikely but could happen)