>Before the ruling Apple was paying about 8B in taxes per year to Ireland.
> If multinational corporations are no longer able to do a Double-Irish Dutch Sandwich anymore, it doesn't make sense to stay there.
That figure isn't going to change, nor are companies going to be running out of Ireland - the tax strategy has been shut down for more than a decade. Ireland has other features which make it attractive to US businesses, including strong historical ties and being the remaining English speaking member of the EU.
If multinational corporations are no longer able to do a Double-Irish Dutch Sandwich anymore, it doesn't make sense to stay there.
Which means the future losses in a single year from several large multinational corporations leaving will be larger than this one payment.