Every single one of our allies would be insane NOT to pursue that course of action: complete and totally decoupling from the US defense industry.
First, if the US (and by "the US," I mean our current mercurial, psychotic administration) at all disagrees with your use of a weapon/platform....the US will disable it.
Second, there is no a non-zero chance, which is rising rapidly, that one or more of our former allies will end up in actual defensive combat operations against the US. It's a terrible idea to be in a situation where your enemy can turn off your defensive weapons as the battle begins.
The only smart move for Europe is to decouple not 50%, not 90%, but 100% from US defense systems. F-35s are a stupid, stupid buy. Because yep, it doesn't matter how good it is if you can't even get it up in the air when you need it.
Think the folks at Lockheed and Raytheon don't see this writing on the wall? Think there isn't massive pants-shitting happening in their business offices? And.....think they are viable if they have no buyers other than the US?
We are on track to completely neuter our domestic defense industry. Fucking brilliant.
France, Sweden, the UK, and Germany 'bout to make some MONEY. At our expense. "America First" my ass.