Ironically the EU warranty rules are still in place and it feels to me like this would probably break them. EVGA can say "Britain has become an bad place to do business post-Brexit" and leave, plenty of people, especially young people who buy graphics cards, would support it (but probably wouldn't care enough to import their products from elsewhere).

But to stay and then make your customers responsible for unexpected charges when your own product turns out to be faulty, seems like a bad sign.