The whole Napster thing was pretty brief, I only remember it really being around for like 6 months. Then it got shut down and everyone moved to the alternatives that had resume and other features, like eDonkey and Kazaa. I really can’t remember what order they came in though.
I don’t think people nowadays can comprehend how basic the OG Napster was. You searched for a file and every single person with a matching file would come up as a separate result. When you downloaded you downloaded only from that one person and if they cancelled it or whatever before it finished then it was gone and you had to start again. You couldn’t resume, not even from the same person with the exact same file.