hitchstory parent
Depends upon the ORM. Like all frameworks, a really good one is a significant productivity boost while a bad one is faworse than none at all.
And not just the ORM, but the way it's used. If you ensure that lazy-loading is turned off from day 1 and stays off, you might be okay. But if you don't pay attention to this and write a bunch of code for N years until all the "select N+1"s you've been unwittingly doing finally force your DB to a crawl... now you're in trouble.