I would like to create a Flow board at "Wikipedia:Article request workshop." I think this would be the first Flow board to not be a talk page (though I suppose the talk page should also be a Flow, for consistency's sake).
The Article Request Workshop is a proposed experimental workflow for requesting new articles, set up as an experiment in parallel to the existing Requested Articles system. While Requested Articles relies on a few dozen lists, sorted according to topic, this system would have one topic per requested article, which is then tagged into one or many categories. This allows a centralization of the different efforts to catalogue the missing articles of Wikipedia, uniting WikiProject-specific requests and WP:RA. (Eventually Flow should allow arbitrary aggregation of topics, but in the meantime this system will make use of a template-based triage system that sorts topics into categories.)
Once this is set up, I intend on notifying WikiProject Requested Articles and the talk page for Requested Articles. The reason why I am setting this up as a separate system is because (a) it's very experimental and (b) the current system is very established and I don't want to disrupt what's going on there right now. That said, I may migrate some or all of WP:RA to this new system.
(This idea is inspired by <https://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_(idea_lab)&oldid=654209203#Requested_articles>).