I find DCCs usefull for spouting out random ideas that are too small for their own threads. It's one reason why I don't like seeing them gone in so many places. But yes, I'm aware that people don't want them anymore.
I was probably one of the first who moved on from Skype to Discord. However, I find myself rarely using it, anymore. Partially because still no internet at home and for the time being. Partially, even after so many years, I'm not a fan of the social media type of conversations that people do these days. It's one of the reason why I also only rarely post anything on twitter. There's simply no deeper meaning behind anything anybody says...
Needless to say: I never was on Facebook. Sure, some people wanted me to be, but I never saw the point.