I got a beautiful Saru-centric story as my Yuletide present, but one reason why I asked for it was that whenever I checked, every few months or so, there wasn't much Saru - i.e. he was there in fanfiction, but not in a central position. Presumably because he's not part of the major pairings (Culbert/Stamets, Michael Burnham/either Philippa Georgiou, Katrina Cornwell/Gabriel Lorca), and shipperfic rules as always.