What does NASA's continued reliance on the Speedmaster, even when newer options were available, imply about the watch?

Answer

A deep, validated trust in its ability to serve as the fail-safe

NASA's rigorous approach and continued reliance on the Speedmaster, even when newer options existed (like the Bulova brought by Scott), implies a deep, validated trust in the Omega's reliability as a fail-safe instrument.

What does NASA's continued reliance on the Speedmaster, even when newer options were available, imply about the watch?
watchspace explorationApolloMoon landingOmega Speedmaster