Ironically, I worked on the BCF program personally. The parts are kitted and shipped to them..
The program has obviously changed a lot since you were on it. Most of the big components for the BCF are now made in China. All the floors, for example, are made there. Freight door frame, bulkheads, wiring, etc., most of it made there now. Still lots of kits from the US, yes, but fewer and fewer as that work is being shifted to China (and other countries). We've shot this stuff coming into the TAECO receiving warehouse. More and more shipping labels no longer say "USA" on them.
More and more 737 work is going to China, too (just like more and more A320 work is going to China).
A big part of our job the last few years has been helping pave the way for these and many other projects that are headed that way and then reporting on them after they are up and running. The Chinese (and the Koreans and the Japanese) are cleaning our clock in terms of cost, quality, and delivery time. It's why we are there along with Airbus.
For example I did not realize until a few weeks ago that the entire fuselage for the AH-64 Apache helicopter is made in Korea. Some for the whole forward fuselage, cockpit, and wings for the F-15.
You can believe the work migration out of the US is no big deal if you like. But we go to these places with our cameras, and because of why they send us there, we know what's coming.
Obviously I cannot spell out specifics. But I will give you a tip. Don't invest in real estate in Everett or Renton.