Yes I know mastadon has been around for a while, it still doesnt change what it is/has become. And there are a LOT of other so called alternate social platforms that have tried to take the place of the major ones for years. So far none have, its not just Parler or Truth. Of the ones you mentioned I am not sure any of them beyond Myspace would ever be considered successful or saw mainstream use, for them to be considered Highly used, then decreased. And none have been close to the level of Twitter, FB, etc. But sure there can be something new that comes along, but it would need to really be something new. FB didnt try to copy Myspace, it was different and new, Twitter didnt try to copy FB it was new and different. So far everyone is trying to copy what is already successful, what is there, and putting some political or other spin on it. That is not really going to work, that is only going to drive the most radical or fringe people there for those reasons, not because its something new/different/cool.
You and others can bet against Musk all you want but he is the richest man in the world for a reason, and its not because he makes bad business decisions, and he has a huge amount of support and followers. He also has built and runs many uber successful billion dollar companies. That are on the cutting edge of everything from digging holes, to going to space.
Personally, I will put my bet on Musk and his companies before I bet on any of those trying to compete with him, or bet that he will "run Twitter into the ground" because I might have a different political view or be scared of someone he allows on the platform I dont like. Or because he refuses to censor those I dont agree with.
There is already talks of him restarting Twitters Short form video platform, to compete with the Tik Tok etc videos, And talk of long form to compete with YT, with income generation. The thing some are focused on is he is airing the Dirty laundry and getting rid of the people that didnt want to actually work. Will there be bumps, sure, just like every change in ownership has, but I expect it to succeed in the end.
I think it is hilarious the people that are bent out of shape over him buying Twitter. Its absolutely hilarious, a whole lot of cope being dealt.
And still my Tesla stock is still doing much better than all his so called competitors stocks are.... of which I unfortunately also own several as well.