ORM is probably the most regrettable. It's as close as you can get in allegory before you're literally hammering a round peg through a square hole. Flattening o

ORM is probably the most regrettable. It's as close as you can get in allegory before you're literally hammering a round peg through a square hole. Flattening out the relational model into a single projection is quite disruptive to downstream consumers once you get beyond the trivial CRUD use cases.