I wish Twitter really had a way to filter subscriptions by "channels". If you tweet about databases and I subscribe because you did, I don't want to get photos of your daughter's birthday, your wedding, your favorite gang-star rap music, or your opinion about Hillary or Trump. I ended up un-following a lot of prominent devs because of this.

If Twitter had a way to filter followed people messages by keyword or hashtag It would lead to a healthier environment on that platform. Unfortunately since Twitter basically locked access to its API, writing a fully featured client with that capability isn't even a viable alternative for the terrible UX ...