Hi Wikitech,
I believe that Flow is being used on an opt-in basis on Wikidata and Catalan Wikipedia, and is used on user talk pages by default on MediaWiki.
Is that correct?
Are there any wikis other than MediaWiki where Flow is enabled on all talk pages by default?
Are there any wikis where Flow is widely used on an opt-in basis, even if it's not the default?
Thanks,
Pine