Was about to answer the billionaires one, realized there are better ways to spend this limited beautiful moment of life than being virtually shouted at.
It happens all the time, but it's usually because I realize that either:
I'm not as invested or informed on the topic as I thought I was and just don't have anything meaningful to contribute
whatever joke I was writing up didn't sound as funny to me after I actually wrote it out
it took too long to write, did some basic research and realized I didn't know what I was talking about
it took too long to write, I got distracted by something, and by the time I got back to it I had stopped caring
something happens to the post I was responding to or my connection, page resets/refreshes and I've lost whatever the thing was midway through, I'm not typing all that again
realize I'm going to say something not very PC and I know the exact responses I'll get, "Nah, I don't care enough about this."