Presuming that a platform is a suitable "master" UI for everything looks to break this utility of platforms and online "spaces".
Moreover, mistaking that a "master platform" is possible for the promise of the fediverse may very well be dangerous if people embrace it with enthusiasm and hype to then be disappointed at how it doesn't work well and then question the value of decentralisation.
And I think that's important because federation doesn't guarantee a good UI. Probably the opposite.
reiver