Twitter had Mastadon; is there a service these users will migrate to en masse, or will the results be more fragmented? Personally, the 2nd choices aren't as clear to me as they were in the Twitter case, which makes me wonder if we will see a mass exodus. I was far more aware of Mastadon than I am of the Reddit alternatives, some of which historically have had less savory reputations. Genuinely curious, what are the long-term viable alternatives?