Denny said nice things about federated wiki at the 2021 Wikimania conference. So in return I will practice until I can confidently pronounce his name. ogg 
https://upload.wikimedia.org/wikipedia/commons/c/c8/Name_pronunciation_Denny_Vrande%C4%8Di%C4%87.ogg?uselang=ca
Denny's vision for WikiData has proven to be both workable and valuable at scale. This demonstrates incremental development of highly structured data within a diverse community.
Denny's vision for language independent (abstract) authoring of encyclopedic text is again difficult to fully appreciate given its transformational possibilities but his track record is indisputable.