I'm personally trapped on Discord and Instagram.
Discord is required by my workplace, so no way of getting rid of it until everyone decides to move to something better. I have some friends on it too, but most of them also made Matrix accounts when I explained I won't be very reachable on Discord (I only open it when necessary; and it doesn'r run on my phone since they rewrote the app in JS). I have Instagram as a way to people I meet during travel or events to "add me" easily, and then we can figure out a good way to communicate afterward. I'm not too bothered by having it as I don't use it daily or anything.