Why do you assume performance would be bad? It's got indexes. Obviously if you never create an index or never profile your queries it might get sluggish but that's the same in SQL.
The dearth of types can be good or bad depending on your use case. I agree that for some use cases it's a bad thing.
I like many things about SQL and still prefer it to RethinkDB in some ways, but there are no SQL databases that offer replication or HA fail over configurations that don't require incredible time investments to configure correctly. This includes commercial DBs as far as I can tell. If you're too small to have a DBA, HA SQL is out... unless you use a somewhat expensive and also restrictive cloud-managed solution. The latter would have been our second choice behind RethinkDB.
The dearth of types can be good or bad depending on your use case. I agree that for some use cases it's a bad thing.
I like many things about SQL and still prefer it to RethinkDB in some ways, but there are no SQL databases that offer replication or HA fail over configurations that don't require incredible time investments to configure correctly. This includes commercial DBs as far as I can tell. If you're too small to have a DBA, HA SQL is out... unless you use a somewhat expensive and also restrictive cloud-managed solution. The latter would have been our second choice behind RethinkDB.