Same at my previous role - we did have some people who were really good at some point, and into DBs. We had a very solid Redis and PostgreSQL set-up, and some advanced stuff for simple data in Redis - but once that knowledge fades with attrition, making space for continued personal development into how two very different DBMS work for a small team is not easy, and it just stays untouched, disliked, and somewhat abandoned forever more.