Hello, the ArticlePlaceholder (AP) seems to me to be a great initiative - if we had it earlier, maybe it would have prevented a lot of "pseudo articles" that have been created over the last years by the hundredthousands in so many smaller Wikipedias.
Recently I checked out the feature in Esperanto Wikipedia. I searched for a person which had no article in Esperanto but, by my knowledge, in Dutch and other languages: "Marietje Schaake". My first search in Esperanto resulted in search results for "Marie de Schalke", with two articles. Only after another search I mentioned, below the page, a link to the AP: "Discover data about the topic". I think that this link could be presented in a more prominent way, in a different wording. "Discover" sounds a little bit like another search, and "data" like something indigestable for human readers. Possible alternatives: "Data sheet about 'item name'", or "We have an overview with information about 'item name'".
In general, but that is a larger problem, the Wikipedia search looks "noisy" and could have a better layout.