Yeah for the most part that works, but I'm also often itching to give my own feedback to the streamer, and that is difficult to do without having it open :D

I will say, in the circles I move in, many content creators are also running a discord along side twitch. Some will even invite people into their voice chat to talk with them on stream.

I much prefer using discord in those situations, but that may be partly due to the higher barrier to participation that using discord immediately entails.