... something like the parser function <code>{{#useliquidthreads:1}}</code> is better probably with the difference that once enabled it will not be possible to change back. I guess this will increase flexibility during implementation and saves admins to add talk pages one by one in "LocalSettings.php". I e.g. would have loved to switch my talk page to Flow already some time ago, but I never made the extra effort of individually asking for it.
Topic on Talk:Structured Discussions
We've already stopped using wgFlowOccupyPages for new pages, and plan to stop using it entirely soon (phab:T90977).
There is now a special page, Special:EnableFlow, which already exists and is planned for enhancement (phab:T72073).
Great, that's very nice to read. Just awarded a like token. Thank you for your feedback.