Yes, it is very helpful.
I am an experienced Drupal-PHP developer and want to help people with specific questions on module and php-development.
These questions are buried deep in the (IMHO) boring[*] "what-module-to-use", hence I steer towards the developing tag always first.
That said, I personally think we might rename it to the more appropriate development.
[*] I, as answerer, steer free of all the "you should use module Y and Z". I find these questions not only boring, but personally think that, most of the time, pulling in three modules to get something simple is just the Plain Wrong Approach.