Why not Mastodon?

Because casual mainstream basic folk (non-techie) don’t like the slight legwork you need to do and understand the Fediverse

I saw an article from Yahoo (Source: The Independent) last week about Bluesky’s current success from Xitter refugees and it also listed other similar groups like Mastedon. What didn’t surprise me is that they said Mastedon is predominantly “techie” which includes the majority of it’s user base as “supernerds” with the site having the “steepest learning curve.” This was an op-ed from an outsider.

Until Mastedon can appeal to simple minded mainstream basic folk (which is a pretty good size of netizens) it will always be a niche group.