I am a pretty heavy Twitter user and have been for a long time. It's really the only "social" thing I use.
I know Fleets is a Twitter thing... I remember seeing it someplace, maybe a story on Hacker News or something? Was it something like a replacement for Vine maybe? Or was it something with threaded conversations? Am I seeing Fleets in my feed? What do they look like? Are they being used at all?
I really have no idea what Fleets is and I use Twitter all the time. Whatever Fleets is I agree with pboutros, don't put that same team in charge of anything else, this rollout didn't work.
(I may be missing something totally obvious and awesome here! Maybe Fleets is the greatest thing since Google+ and I'm to set in my ways to notice or care? This could very well be another "It's not you, it's me" thing and I'm too dense to see it.)