They could They could pull out of the UK, and to hell with the consequences, but then if the EU decide to do the same thing, or the US, or China says "hold my

They could They could pull out of the UK, and to hell with the consequences, but then if the EU decide to do the same thing, or the US, or China says "hold my beer", then the problem becomes much larger. Losing the UK market wouldn't impact Apple that much - it'd be a hit to the stock, of course, but as a fraction of worldwide business, it isn't that huge. Larger markets would be a bigger issue.