Knowledge Graphs and Wikipedia... I thought we were friends?

I've been seeing a lot of stuff on here about Wikipedia being devalued by Google, but can't find much evidence to suggest that, especially as Knowledge Graphs and the method entities score are massively driven by Wiki pages/other high value domains.

Can anyone provide evidence here?

My current view is grey hat SEO will continue to work (e.g. paying wikipedia editors)... Change my mind!

Cheers