The problem I see with federated wikis is potential creation of echo chambers. Current Wikipedia is often a political tug-of-war between different ideological crowds. For instance, on Russian Wikipedia, Russian Civil War article is an infamous point of struggle between communist and monarchist sympathizers, who often have to settle at something resembling a compromise.
If both sides had their own wikis, each would have very biased interpretation of events. A person who identifies as either communist or monarchist would visit only the corresponding wiki, only seeing narrative that fits into their current world view, never being exposed to opposing opinions.
I’ve upgraded to Pixel 7 last year to run GrapheneOS. Honestly it was a very underwhelming upgrade. My 2019 Oneplus 7T is still kicking running LineageOS, could go back any second and not notice.