@TobyEsterhase
Various sources eg Economics Observatory indicate that in the short term (definition?) a newly independent Scotland would suffer economically.
Aside from the question of currency, there would be the question of a customs type border with England - esspecially if Scotland rejoined the EU (NB Spain has indicated that it might not block Scotland joining. Why? Gibraltar. Political mischief?).
Additionally, Holyrood would face difficult decisions regarding funding of the NHS, Welfare, Education, Law & Order et al. Uniquely, Scotland (like the UK) has a free at the point of use NHS. All (?) other countries use some form of social insurance. This is why small countries of comparable size to Scotland eg Ireland can manage - their health service is not free. It is the reason that despite a Sinn Fein FM in NI, support for a reunited Ireland is still around 46%. Even nationalists are reluctant to lose the NHS.
Above are some "against" reasons. And they are powerful.
In mitigation, in 2023 Scotland achieved 100% energy self-sufficiency & we export the excess to rUK. Water also, on occasion.
Faslane - and other NATO strategic bases - could be leased to rUK like Hong Kong was to China (annoying the Greens & breaking SNP policy).
We have tourism, whisky, gin & other craft alcohols. We have a uniquely successful scientific & technical base encompassing astrophysics to bio-sciences.
All potential revenue.
Oil & Gas though unreliable is also a potential revenue earner.
Holyrood would have the power to keep all revenues eg tax; VAT. They could introduce a social insurance scheme based on tax band.
Is the above enough? No idea. The leap into independence - like Brexit - is a leap into the unknown.
Cameron opined that he believed with heart, head & soul that the UK was better together. So some voted agin independence with their heads, but their hearts & souls are not & still not for the Union. The only union that they want is the European Union. The Union Flag means nothing compared to the golden stars on blue.
When unionists ask, why leave one union for another they are never given the true answer. Because it is an answer that hurts. One union is quite simply preferred over the other union: one is trusted more than the other.
I don't think that now is the time to re-open independence. The UK is near broke & needs all hands to the pumps. Polls swing between 41% Yes to 52% Yes thus neither side can be sure of victory.
And then there's Putin.
Best stick together for now.