Theres a lot of discussion here against centralization, but i wonder how possible it would be to maintain a federated infraestructure and build on top a mega meta search engine for centralization of resources

That would be amazing and even building a streaming app in too of it to compete with strraming services. Something similar to stremio for films and a music streaming service

Try Logseq its amazing

Logseq is better than Obsidian and open source

it is not even true that “privacytests.org rate it as the best”, if you look close enough, librewolf is best rated, which is an amazing browser BTW.