It's taken me a while, but pretty much all of my main contacts are on telegram, I managed to convince them all, simply because the text chat is so much lighter than Skype or Facebook, works cross-platform without issues, and is instant unlike the other two. However, the inability to export my own chat history with my contacts is the breaking point, and if they continue to ignore it, it's going to push me to another messaging service which actually respects data liberation.