“The two wings of Webb’s primary mirror had been folded to fit inside the nose cone of an Arianespace Ariane 5 rocket prior to launch.”
Every major deployment worked, a million miles from any repair crew. That was the scary part, and it is done. The hard part is not. Ground control still has to drive 126 actuators to line up 18 mirror segments, and only then do we learn whether the $10 billion bet sees anything.