If they had to build Harriers, they could. I wonder what 1970s Harriers, with upgraded comms, radar and weapons would be like? Maybe 'good enough' in a lot of situations. If they didn't spend 20 years integrating some overly complicated 'Meatverse Helmet' etc. i.e. they took a 'build it now' wartime footing ... I wonder what they could build ...
No they couldn't build new Harriers. The production line was shut down years ago. The supply chain for many critical components no longer even exists. The production workers with essential knowledge have mostly retired. It would take many years to try to recreate, and at this point it would actually be more expensive than just buying more F-35B's.
