For workloads which are read-heavy, I think a single database can be a great solution -- a small monolith has exclusive write access to the db, and any number o

For workloads which are read-heavy, I think a single database can be a great solution -- a small monolith has exclusive write access to the db, and any number of polyglot read-only services are connected to as many read-replicas as are needed for horizontal scaling. For write-heavy workloads, best of luck to you :)