I have dual nationality, DH is in the process of naturalising so will soon have dual nationality too. But we both grew up abroad; Europe, non-EU. Our children were born here and have dual nationality.
Going 'back' has always been a vague possibility for some time in the future.
Brexit did two things: Firstly, it made our desire to go 'back' grow immensely, it has become a thing we quite desperately want now. (We didn't emigrate from our home country to 'start a new life' - it felt more like moving from one town to another, following a job. Now suddenly our move feels like emigration. Not something we consciously chose to do.) Secondly, it has made it a lot harder to achieve, because our assets have been devalued with the pound. Our 'home' country has always been expensive, now it is no longer affordable. E.g. in terms of pensions, even if we can still transfer what we accumulated here, it will be worth very little there. We'd have to 'start again'.
We feel quite trapped and fear it will only get worse. If we stay, we expect we will remain relatively well off within a country getting poorer and poorer, so above average but with the average continually going down. So it will become harder and harder to leave, and we expect quality of life to decline.
We have a plan, are working towards leaving. That involves saving, working towards increasing the value of our house for when we sell up, and getting ourselves into position for being able to apply for jobs. But we fear that events will overtake our efforts.