The US has refused to sell Taiwan new F-16s-what makes you think they will get F-35s???Besides, the current ROC government is too busy sucking up to Beijing-this wargame is hyperbole because there may not be a Taiwan in 2020-without a shot being fired.
I think the F-35’s will be online in Taiwan by 2020, assuming Taiwan still wants them. There’s just too much pressure in the Pentagon and a heck of a lot of pressure on congress-critters to keep aircraft plants humming to turn down Taiwan’s request a second time.