Just being "Postgres" is not simple. Both Spanner+CRDB provides some custom domain specific language that helps the data distribute itself around the cluster (o

Just being "Postgres" is not simple. Both Spanner+CRDB provides some custom domain specific language that helps the data distribute itself around the cluster (or the world). Or for example, change the primary key of a table, so that the database can change the distribution of a table without having any down time. I feel like the usual "lift and shift" claims that Cloud providers claims never goes as planned, and it is not something that you can just easily find by just reading documentation. For example, only after I started using CRDB, I found out that case-insensitive indexes is not yet implemented. But I have been using CRDB+k8s for >1 year now, and it has been a great database. Basically 0 downtime, with minimal effort, including database upgrades.