STS-93: Dualing computers
waynehale.wordpress.com/2014/10/17/sts-93-dualing-computers
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
In the early days of rocketry, when subsystems reliability was low, hard experience led designers to add redundancy for critical functions where they could. Redundancy comes at a cost: increased weight, increased complexity, unintended interactions, complex schemes to manage the redundancy, etc. Now days, subsystem reliability is much higher, especially electronic parts. So today we…