Contingency plans and working towards avoiding a disaster is not the point at hand, the point at hand is people are saying disaster is inevitable regardless of what planning and work is done to mitigate it.
Do you see?
My examples were probably not the best, as none of those countries at the time were a G7 powerhouse from the civilised west, but if you have never heard of the Czech republic, Slovakia, Lativa, Montengro, Serbia, Georgia, Armenia, Moldova, Belarus, Ukraine, Boznia and Hertzegovina etc etc etc all either gaining independence from a larger political union or from a former occupation then......
Yeah.
The situation in the UK is a lot, lot different, its not breaking from a overbearing ruling political system, its not part of an empire, its not occupied, its separating from a consensual economic and partial political partnership which is a lot less dramatic.
That isn't what you said though. You said you had 'survived around 8 (probably more) apocalypses predicted by various experts and governements, I am not attributing too much weight to this one.'.
So I asked what these apocalypses were exactly and do you not think that these 'apocalypses' may have been, to some extent, but the accurate recognition of those potential disasters and adequate planning is what helped prevent them? If one of my surgical colleagues was to operate on you and tell you there was a 10% chance of death and you came out ok, would you feel the surgeon was simply catastrophising? Or that perhaps the surgeon had foreseen the potential consequences and done all of the relevant things they needed to, such as keeping sterile, doing constant checks during the operation, having a competent partner and going to medical school for 6 years and then training for a further 10 years before becoming a fully fledged surgeon?
I mean, I don't get what you're doing here, especially with the patronising tone. You've listed multiple countries that literally had years of strife following an exit from a union and then come in, with the exact same tone.
Firstly, 'leaving' the Soviet Union as the entire union collapses is wholly different from leaving a fully functioning union that you are inextricably linked to.
Even some of those countries you have listed
Aremnia: War with Azerbeijan, blockade by Azerbeijan and Turkey, economic difficulty,
Latvia: Initially occupied by Soviet forces and didn't provide citizenship to many of its non Latvian citizens. Decided to join the EU and NATO.
Montenegro: Civil war
Serbia: Civil war
Georgia: Coups, separatism, wars, ethnic cleansing and still currently Russian occupation of certain territories
Moldova (I'll be honest, I know nothing about Moldova)
Belarus: See Moldova. Don't they have Europe's last dictator as their president?
Ukraine: Country lost over half of its GDP in the 90s, has had rigged elections, uprising/ protests, territory annexed and swathes of the country enveloped in war vs separatists/ Russian agents.
B&H: Civil war
Czech Republic and Slovakia certainly doing well, though both have entered the EU and I think NATO (ie deciding it is probably better to be part of a union...)
So I guess it depends on what you class as leaving a political/ economic union well. I actually think long term, it may well be ok for the UK. I don't think it will become some kind of mad max But short term, especially in the event of no deal, it would be a disaster. And the examples you've decided to provide as examples where countries have left without much trouble (and instead have listed a bunch of countries that have mostly undergone civil war, partition, economic strife, occupation, ethnic cleansing etc. You've listed perhaps 2 countries that have come out of a union without much immediate issue (there may well be some African examples, I can't pretend to be an expert on all of African post colonial history). Doesn't exactly fill me with much hope.