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They're talking about two different changes:

"bunch of grad students"="patch MCAS to not auto-crash"

"really complicated"="redesign entire compute architecture to be multi-master and failure tolerant"

"really complicated"="make an architecture usually done with three computers work with just two which were incidentally architectured and dimensioned for a different job. Get this done in a lot less time than usual and btw. you don't have the usual freedom to discuss constraints one usually has at this point.".

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