It the section where you criticize graph is unfair. 1. All databases can be immature. 2. There is a whole world of graph DBs where strong schema support is the cornerstone of the system (TerminusDB, Stardog etc.). 3. Some relational Dbs have little tooling - Neo4j, as the oldest and most successful graph, has way more tooling than johnny newcomer RDBMS 4. performance characteristics are hard. That is not a necessary feature of graph. 5. Query languages - so you are saying only SQL will do? Lots of graph DBs use datalog or a variant (Datomic, TerminusDB, Opencrux). It is a well understood, powerful and composable approach to query. Yes, some query languages have flaws, but we should be open to doing better on query. SQL fundamentalism is wrong.