Both are good, but I think the current trend towards postgres is because - postgresql arguably has a wider featureset than mysql/mariadb [1] - recent versions

Both are good, but I think the current trend towards postgres is because - postgresql arguably has a wider featureset than mysql/mariadb [1] - recent versions of postgresql have solved many of the issues that used to prohibit adoption (scaling issues, logical replication, etc) - since the Oracle aquisition of mysql and the subsequent mariadb fork, the waters are a little muddied for potential mysql/mariadb adopters with regards to which fork to choose and if that is the mysql fork, whether it will remain free. - postgres is default on heroku [1] https://en.wikipedia.org/wiki/Comparison_of_relational_database_management_systems https://en.wikipedia.org/wiki/Comparison_of_relational_datab...