Personally, I don’t care as don’t follow streamers myself. But seems like the right thing to do is to not abandon the people that built you up to begin with because something shinier shows up. Make a transition over time to something new, sure. But when it’s sudden like this, it’s hard to see it any other way.
Depends on the streamer, I guess. Personality probably matters more to those that are variety streamers - people that play many different games at any given point with a large general audience and probably less important for those that specialize in a specific game that has a built-in community of people interested in that game.