You don't need (or likely even want, c.f. "eternal September") the general public. You just need your discussion group. e.g. if you want discussion of mathemati

You don't need (or likely even want, c.f. "eternal September") the general public. You just need your discussion group. e.g. if you want discussion of mathematics from world renowned experts like Terence Tao or Tim Gowers, you would use Mastodon.