I've had a very similar journey. I also campaigned against them, rejoiced when the hard drives were shredded after the election. I am now less worried. The devil is in the detail, and the issue last time was in the database rather than the cards. That said, I think since then we have bigger concerns, and if an ID app alleviates some concerns about immigration then I'm fine with it. One big thing that has happened since then is GDS – the various GOV.UK apps tend to be actually good. I recently used the new GOV.UK One Login app to renew my driving licence and it was impressively good.
> and if an ID app alleviates some concerns about immigration then I'm fine with it
It won't.
The US border is now locked down far tighter than it ever was when I was a kid, and the cries for locking it down even more and violently apprehending suspected violators are at a fever pitch. The UK too - like many countries in the recent rightward lurch - has gone from a country where I can just show up to visit to one when were I need to request permission beforehand.
It sure seems like the "concerns about immigration" in the UK mirror those in the US, which in my analysis is a reaction towards the loss of white privilege combined with the loss of economic power. Putting stricter id checks may assuage abstract xenophobia, but the concrete details don't fundamentally change the concrete details.
It's not like Brexit fixed those concerns about immigration.
'Opinion polls found that Leave voters believed leaving the EU was "more likely to bring about a better immigration system, improved border controls, a fairer welfare system, better quality of life, and the ability to control our own laws"'
Doesn't seem to have helped, has it?
So a justification based on a premise of alleviating some concerns about immigration has a long historical trail of failures behind it, as I'm sure the Windrush generation can share. The US and Canadian citizens along what was once pridefully called the world's longest unprotected border have also their misgivings.
As I read here, the UK passed the law that required employers to check employee eligibility. I'm sure that was meant to alleviate xenophobic concerns. Why wasn't that enough?