1. Messenger was the thing that ultimately locked me in (and most friends I suppose). It&#x27;s just great software that everyone uses. Sure if I could get everyone to install telegram I totally would. But it&#x27;s not happening. The way you phrased the question shows your not a big IMer.<p>2. Messenger + some Snapchat basically. I have only one friend that didn&#x27;t make the switch to Facebook and keeps on using old IM software that used to be popular. Our friendship (wasn&#x27;t a huge one) kind of died cause of it.<p>3. I don&#x27;t think most people care. It&#x27;s the way things are. Most also seem to be fairly aware of what&#x27;s being exposed publicly and curate their behavior accordingly.<p>I have to note I basically only have friends online. I&#x27;m 22, I kind of consider myself an early adopter. Just 4-5 years ago it was pretty weird to most, nowadays its slowly entering the mainstream. Younger people seem especially adept.