How can I force Flow talk page manager to disable Flow on my talk page?
Topic on Talk:Structured Discussions
On which wiki?
If you've got it enabled as a beta feature, disabling it there should remove the StructuredDiscussions system from your talk page.
On a wiki like this one where it's enabled by default, you instead need to go to Special:ChangeContentModel and change the content model of the blank page to "wikitext".
I meant this wiki. I know changing content model is restricted to administrators here. Yes, I want the same feeling as on Ciencia Al Poder's talk page.
Oh, right, this wiki. You should have asked on Project:Current issues. :-) Done.