This was going to be an "excellent new user" answer, but then I realised that her previous posts were in 2021. Anyway, Alice posted a great answer to What's the term for multiple levels of reality in a fictional work?
While searching through my own appreciative comments from the last quarter, I found several excellent answers from Clara Diaz Sanchez, including to a couple of questions that I'd tried to answer with less success: Has there ever been a stage production of Chapter 15 of Ulysses? and What did Lem find in his game-theoretical analysis of the writings of Marquis de Sade?
Late edit to this meta answer (after some upvotes already happened), but I also want to highlight new user Lewis 010, who provided several great answers in November 2022, showing deep insight into the history of literature: Origin of "The bells! The bells!" quote and Was it so unusual for the time for Journey's End to have no leading lady? and When did detective fiction become primarily about murder? are all worth highlighting.