What's preventing you for from casting about your niche interests in channels?

How can we make it easier / more likely that you would do it

If we changed channels to "narrowcasting"

 i.e. only people who follow the channel will see it in a feed vs. today where all of your followers see all of your casts regardless of channel

1. I would want this for most channels
2. I would want this for some channels
3. I would  want this for only a couple of channels

i think #1 will be a classic case of stated vs. revealed preference

a lot of people will probably say #1, but then will cry for more distribution

everyone in the end will want as much distribution as possible 

if they don't need distribution it might as well be DC group

Yep, usually people say they want extreme opposition just to get away but then realize somewhere in the middle is better.