It was risky then too. MS DOS did have viruses, TSR programs and others could use TCP stacks ( like WatTCP ), data exfiltration via data files was a thing ( eg an infected wordstar that would save other files into a word star document being sent for printing).
I used to sell anti virus, and the threat models for some of the clients were Eye opening.
I used to sell anti virus, and the threat models for some of the clients were Eye opening.