It shouldn't be trashed, of course, but it probably needs to be tempered - I think the youth vote was attracted to an idealism that deterred the oldies.
In the run-up to the 2014 referendum, we got told that independence would lead to us being leaving the EU, the end of the NHS in Scotland, currency collapse, an economic downturn and so on and so forth. All of the arguments about why it was such a bad idea were then flipped for the Brexit referendum.
I'd rather England left the UK, but will happily take Scottish independence instead.
Thing is, back in 2014 that was indeed a small risk if Scotland became independent. These days however, Scotland will be leaving the EU and independence does at least give a chance that it could re-join again.
Personally, I voted against independence in 2014 as I felt Scotland was stronger as part of a bigger group of countries. Ironically for this reason, I'd now vote in favour if there was another referendum. The UK will unfortunately wither and decline - especially with Boris and his chums sucking the country dry. I'd now rather Scotland got out, applied for EU membership again and left the rest of the UK to their fate.
And I say this quite sadly, what with having family and friends in England, plus being an Englishman myself...