One can argue that CDC was obliviously dead by the early 70s.

Incompatible, increasingly archaic platforms, the best of those optimal for batch Fortran number crunching, counter to industry growth/interest. Organizational metastasis with a next gen platform (Cyber 180 as Star was stillborn - CISC from hell as 2nd system(s) syndrome) only at the end of the decade. Standards, coupled with profound organizational incompetence, ground it to dust. They made really good OEM disk drives for a while but sold the business off to fund their continuing failures.

There really needs to be a history that’s not an encomium to William Norris, Philosopher King of CDC.