I will play devil advocate
Relational databases add too much time overhead due to building schema or configuring orm for schema
Migrations management
Building an db model to domain model mapper and maintaining it
You waste time thinking about building an db model and focusing on that technical layer which probably eventually affecta the way you model your system
Nosql gives you modeling freedom which is handy for architects
Using a relational DB doesn't necessitate the use of an ORM. This is another case of YAGNI. I rarely reach for an ORM until there's significant enough complexity to warrant it, and even then it's not a decision made lightly.
Designing and maintaining a schema is not too arduous. There are tools which can produce a diff between the current and desired schema for your database, for instance Migra for Postgres (https://github.com/djrobstep/migra).