ORMs are good for manipulating complex object models and doing mostly trivial queries. However, the vast majority of queries are trivial. Maybe 2-5% of querie

ORMs are good for manipulating complex object models and doing mostly trivial queries. However, the vast majority of queries are trivial. Maybe 2-5% of queries or bulk modifications can't be easily modeled. The result is still huge savings in time, effort, and code. Also, if you're basing your entire understanding of ORMs on ActiveRecord, you're missing out on a lot.