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yeah, but I got the impression that the EU is very much doing it as a retaliation to the US and UK doing it. Tho they could have limited it to just those countries.

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The US, maybe. But wiki suggests ETIAS (the EU one) was proposed in 2016 whereas the UK ETA idea was created around 2023, so ETIAS can't be a reaction to ETA - perhaps the other way round?

I'm not sure if, without Brexit, the UK would have ended up with ETIAS anyway - it's a "mostly Schengen but not exactly" thing so it would have depended on what agreement they came to.

You're right, I misremembered the order in which I learned about these things as the order in which they were announced.

(lol, I sound like an LLM apologizing for getting something wrong but I promise I'm human :) )

My impression was that the EU did it to prevent people doing visa-free layovers from claiming asylum, while the UK did it to negotiate a dual exception with the EU in the future.

ETA is a visa to the entire world in all but name. I'm not looking forward to the future where every county implements is and visa-free travel becomes a thing of the past.

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