Because it isn't that useful in Erlang, so the want to have it has not been that big. Most (proper) Erlang programs happen to be a lot of small functions and yo

Because it isn't that useful in Erlang, so the want to have it has not been that big. Most (proper) Erlang programs happen to be a lot of small functions and you know what function caused the error and the error type to boot in addition. This information is often enough to quickly figure out what is wrong. The trouble arises when you have a large function you did not break up yet because then finding the culprit is much harder. While I like the change, there is a risk associated with it. Namely that people will be less inclined to break up their code.