> I would emphasize the importance of batching and set operations.

Please, preach your gospel more loudly and frequently. It always feels like people complain about RDBMSs being slow because they run insert queries one at a time.

There's always a bulk insert, but I wouldn't say every engine has always had a reasonable way to bulk load truly large data... parquet really helped with interop but before that when your best option was a CSV and bcp life was not fun.

Well yeah they should've banned ORMs in the Geneva Convention. Quickest way to irreversibly ruin your schema design and backend code.