The comment said nothing about the ban having to be this instant. They said to stop all trade. That could just as well mean, take the necessary steps to stop all trade as feasibly fast as possible. How long do you think it would take for China to be able to export computer hardware directly to the EU if the EU said tomorrow "As soon as you can supply hardware, we will stop all trade with USA"? China is the champion of accelerated manufacturing, they'd be supplying us in a couple of months.

There already is open source software solution for by FAR most software that is used. Most companies don't actually need proprietary software from USA, they can switch very quickly, especially if they get a deadline in a month to switch everything away from Linux, 'cause then the profits are on the line.