I beg to differ and strongly disagree. Pre-Microsoft Skype was a genius invention and performed admirably for the time (~2005) considering how limited PC specs

I beg to differ and strongly disagree. Pre-Microsoft Skype was a genius invention and performed admirably for the time (~2005) considering how limited PC specs and bandwidth were back then. It used p-2-p over port 80 so it would always reach its destination no matter the firewall rules on your network, and it allowed file transfers up to 2GB(!) in size, in 2005(!). There were no better alternatives at the time.