Twitter has become all hot takes, drama, and people trying to be clever and/or funny. Will infosec twitter ever get back to information sharing and problem solving? Am I following the wrong people?

No, it won't come back. You aren't following the wrong people. The right people left.

And where did the “right people” go?

From the sound of it, LinkedIn, Slack, or Discord

You can’t just say “Slack” or “Discord” we have to talk specific servers and channels. LinkedIn has signal-noise issues with too much self-promotional wool gathering and little hard content.

No public ones, that's the issue. Or at least much more fractured IMHO. Public stuff has been crapped on... by too much of the public. Can't be public... or the public ruins it. A lot more niche groups too.