The developer-focused StackOverflow puts PostgreSQL second after MySQL, with Microsoft SQL Server third and Oracle way down at 8th.
DB-Engines on the other hand, which measures general discussion, puts Oracle top, followed by MySQL, Microsoft SQL Server and PostgreSQL 4th.
And backup and restore is provided by the pgBackRest extension.
Perhaps the most interesting addition is Patroni, developed by online fashion platform Zolando to implement high availability, using Consul, Zookeeper or Etcd, which are existing tools for managing distributed services.
The rationale behind the product, according to Chief Experience Officer Matt Yonkovit, is that with PostgreSQL "there's all these extensions to fill in gaps, but they're not supported".
Therefore a pre-built and supported package of the core product together with important extensions is useful.