Boeing designs from 1994 are not the ones that have been in the news for design and manufacturing problems. Boeings built in 1994 are not generally falling out of the sky. They don't have MCAS. They don't have plug doors mis-installed.

Yes, that's not that old. But 30-year-old airframes have 30 years of maintenance, and by then, the maintenance aspects start to predominate over the design aspects as a cause of crashes.