I'm curious what your environment is like, because my experience has been the opposite. No one that I know would recommend a nosql database in the vast majority of cases. Especially since there's great offerings out there nowadays, and plenty of proven experience with stuff like MySQL (most often with Vitess) supporting super high loads such as Youtube, Shopify, GitHub, etc. MySQL scales for a lonnnnng time. And the same is true for Postgres, with multiple hosted offerings and also reimplementations that are PG compatible.
My experience is that NoSQL databases are used in last resort situations: you _need_ Cassandra, etcd, ElasticSearch for XYZ reason, as a dependency to another distributed system. But I haven't seen anyone suggest actually using stuff like MongoDB and the likes.