I'm always surprised by that, I've worked with 10-15 people team on relatively large rails codebase and, yes, the bugs we usually see are not type related bugs

I'm always surprised by that, I've worked with 10-15 people team on relatively large rails codebase and, yes, the bugs we usually see are not type related bugs (including nil when it's not expected). I keep reading people saying that type systems eliminate a huge class of bugs but, it's not been my experience with languages that use poor type systems (java, rust... ). Languages that have much better types like OCaml are different and I've had great luck with OCaml in particular (my favorite language to use when I can) but, there's also the fact that devs who use ocaml tend to also be much better than average (in the same way that in my experience devs working with php or nodejs exclusively tend to be much worse than average). Note before I'm downvoted for my last comment, there are exceptions but looking at the average candidate applying for a php, nodejs position compared to one for rails and one for ocaml.