I worked at a construction supply company and a gas station while in HS, neither of which had very sophisticated invoicing and inventory systems, IIRC. I don't remember having any thoughts on the subject at all, except that it seemed like a popular thing to talk about. In other words, it was the latest, "could Y2k give your kids autism, poison your drinking water, or cause gas prices to go up!? Find out that and more at 10PM tonight!" newscast fodder.
So, it was a non-event for me.