Users of Logseq should be able to filter all pages with their tags like in Reflect. This way users can have a very simple interface for doing very complex queries, making Logseq available to a much broader audience. At the same time this enables power users to focus on building up the knowledge instead of focussing on queries. The more quality information is in the Logseq system, the more value you will get from filtering in all your pages into certain topics.
Example of how this looks in Reflect: