I'll also note that Twitter was pretty open and had lots of goodwill, which would have made competing against it really hard. Twitter getting rid of 3rd party

I'll also note that Twitter was pretty open and had lots of goodwill, which would have made competing against it really hard. Twitter getting rid of 3rd party clients (pre-Musk), and shutting down API access (post-Musk) burned a lot of goodwill, leading to large spikes of growth of the Fediverse, and creating a window of opportunity for a microblogging service from Meta.