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.
But the reality is things are different now. The threat model is different.
You can’t just copy a “cdrom” full of 200 shareware titles you got in the mail and let your kids randomly run executables.