As searcher intent changes, Google's search results follow.
Always interesting to see how quickly SERP features and ranking pages can change when users expect different results.
Last month, the search term "mastodon" had a prominent Knowledge Panel for the band, along with the top organic listing. The second organic listing had a Wikipedia article for the animal.
Today, Google displays a Knowledge Panel for the software, along with the full sitelink treatment (for branded queries) for the most popular server, including popular pages within that sub-domain.
#SEO professionals: pay attention to the hints that Google is giving you about search results. Don't waste time trying to rank for queries where the intent isn't right.
cc @Gargron