Comment by richardw

Temporarily. At some point all the allies need world class kit. They just can’t buy it from the US exclusively. But they have committed to higher defence spending. That problem solves itself over time, especially when the world’s researchers are now looking for a safer home than under this administration.

TL;DR: you don’t need a world class jet when you trust your partner 100%. Anything less than 100, collaborate fast to overcome the limitation.