Blue sky (and just about anything else) is an improvement, but remember, there is no bottom, things can always be worse. Truth Social and Gab both still exist.
These websites, because they are all centralized, are all ultimately moderated in accordance with the whims of their owners, the effect of which was thrown into sharp relief after Apartheid Willy Wonka bought Twitter.
With a federated platform like Mastodon, no single owner would be able to do this. If an instance suddenly became terrible, they could be de-federated and they'd lose their reach.
Of course, if one instance became particularly large, the 'whims of the owner' problem would come right back, but at least the alternatives would still be readily available.
What's the point of having "Fuck You Money" if you don't say "Fuck you" when it matters?