If you don't fully understand what happens under the hood with those ORMs and limit yourself to its, well limitations, then somebody is going to have a bad time

If you don't fully understand what happens under the hood with those ORMs and limit yourself to its, well limitations, then somebody is going to have a bad time. And in my experience too, with almost with all (read all that I tried) of them, some queries end up to be way easier to write yourself, and most frequent this is performance/resource issue.