I'm fairly sure that this was driven by a similar sales push.
Mongo has always been a sales and marketing company first and technology company second.
I'd love to see a tear down of their sales and marketing strategy coz its clearly top notch.
Google Trends comparing "NewSQL" with "NoSQL" https://trends.google.com/trends/explore?date=all&geo=US&q=N... (Peaking with its introduction in 2011).
It doesn't seem like a more fashionable term than NoSQL.
For any use case, SQLite is one of the best ways to persist structured data to local disk.
Its a little scary how much it can actually handle, and how lazy and sub optimal it is to reach for a "real" sql server before you need it.
Having the database as a simple file right next to yoyr application is incredibly convenient not to mention how brain dead things like backups are to grok.
VoltDB: https://www.voltdb.com/blog/2016/09/nosql-vs-newsql-whats-di...
Spanner: https://cloud.google.com/blog/products/gcp/from-nosql-to-new...