I respectfully disagree, and say that hand soldering is not a dying art. If you’re working on boards on the regular you probably have a soldering iron and use it often.
I don't like facebook the product, but I think they are being dunked on, too unfairly recently.
However, I'm most amazed and impressed how facebook has created a team -- likely compensated in FB equity -- and then convinced the world that the team is an "oversight board".
From my perspective, I see a project that took years of prep. Multiple papers were written. It was tested on software sim, and NASA's physical space simulator[1]. And it finally _successfully_ flew on mars, with some minor bugs.
In my opinion assuming they were "testing in production" (production being mars!), or writing code that "definitely not have passed code review", or that they did not do couple of hours of flight testing on earth, is an unnecessarily unkind assessment of this project.