eMule was introduced in 2002, which is again NOT THE 90s. Napster also uses a very different protocol, without any of the distributed file sharing. With P2P like Napster, soulseek, and DirectConnect you downloaded a complete file from one person only. Once you had it and could share it, someone could get it from you. But downloading bits of the same file from multiple peers at once was not a thing until after BitTorrent’s release in 2001.