NoSQL was only ever a marketing term. Things like Mongo are what’s been known as KVSes (Key-Value Stores). Mongo basically just rode a hype wave into extremely large amounts of funding but predating it by at least a decade was libmemcached, which lacks the “relational light” functionality that Mongo added but is a more resilient version of the core concept.

Technologies like Redis actually ended up adding significant innovation but they ended up mostly eschewing the NoSQL term anyway.

Hah! Of course it is, I didn’t know that but words stopped meaning anything in tech ages ago and reality is finally catching up. Makes sense though, Azure and AWS both are webs of different data stores and interconnections now.