I kept Twitter to "advertise" when I write technical blogs which I do very little of these days due to time.
I follow a bunch of tech type stuff I'm interested in, but honestly, it's become more of a place to vent and whine about this or that.
When I step back and look at it from afar, it's kinda what Facebook was when I left it a decade or so ago; people whining, and any subject worth commenting on is too controversial to do on the likes of Twitter where nuance is easily lost in so few characters.
I see no real need for me to be on Twitter anymore. I'm not on any other social networks aside from linkedin, which also seems to have lost its professional focus.