I wonder why ORMs still(?) work as simple wrappers and never track access patterns. If you see that `in books` generator’s results experience accesses through a relationship, it’s pretty obvious to join it in advance after few misses and serve `book.author.full_name` from cache.

Of course that would make ORM more complex, but why would you need one otherwise. A good database interface should make good guesses, probably with some hints that could be slapped over without changing naive code patterns. But instead we get 1000 different cool ways to create a table and select a row by id.