Here's the kicker-- when I read the headline (having been an ICBM crew member 1983-88...and back in a senior leader capacity in that community in the late 2000s), I was fairly certain that I knew what system they were talking about. When I opened the story, it turned out I was right!
Here are some things that the story didn't say, however:
While the system did originate in the 1960's as "465L SACCS" (
https://en.wikipedia.org/wiki/Strategic_Automated_Command_and_Control_System), it was upgraded in 1986-87 time frame to something called "SACDIN" by Lockheed Martin. So it's not a "1960s system", it's a "1980s system"!
The system is too old, I agree...but not due to military or government stupidity or lack of foresight (as the article seems to imply), but rather the fact that there is never money available to upgrade it. Since the imaginary "end" of the Cold War in 1991, our civilian and military leadership have placed little or no priority on these forces. Since 1991, no US president has articulated a "new" nuclear strategy-- or embraced an old one for that matter. Nuclear programs are simply not a priority, and have not been for nearly 30 years. During the same period, no US leader has made a case to the American public regarding the continuing relevance of these forces. As a result, the force has been an easy target for neglect over the years (to include budget), and so, for that reason, it is continuing to employ a system that still uses "floppies".
Sad but true.
Kent