Couldn't even find the programmer after he left the corporation. A software maintenance nightmare.
But until just the past couple of years, there's been major concerns with login access to medical equipment - especially wrt insecure WiFi SSIDs.
I don't think that really falls under the "hindsight" proverb either, IMO, it's kinda moronic at the outset. Machines that monitor and administer delivery of medication, pacemakers, Etc.