It’s good that Logseq has linked ref filters (although they are very unwieldy on pages with a lot of tags, should have search, overflow so they don’t take over the whole screen, etc). However, I really miss the ability to filter page contents from Roam.
For example, you could imagine that you inserted a lot of #metareflections in paper notes, and you want to only see these, or exclude these. (Only seeing them can be done through a query, but excluding them cannot).
It would also be really powerful if you could include page tags in a global filter. Imagine you import a bunch of academic notes from Roam, and you could filter from seeing just the academic subset of your notes, including when you search/query etc, or just the personal notes, or all.