Actually is it confirmed that Xtra ones are MADE in China? Cause I see a couple of claims in the previous pages that the Aerons were MADE in China and "confirmed" by Xtra personnel. But looking at Xtra's website, they mentioned the chairs were only ASSEMBLED in China because the assembly line US are affected by the lock down. ASSEMBLED in China and MADE in China are are completely different thing, as the prior can mean that the parts are still made in USA.
you are right, xtra is assembled in china, most likely the parts is made in USA.
assemble in china include QC which is quite important for longevity of the chair.
personal opinion, i still prefer made and assembled in USA even without warranty and save $500