So I've read that there were a few proposals creating a sister site covering these kind of questions. But they are never opened because they don't want to create a sister site on area51 because this site is already there and others putting SO as alternative.
Then I'm back on this site with a question about developing apps and It's not welcome here :-)
So back to SO but it seams to global for me.
I do agree that creating al sorts of small sites is too much.
Like drupal has his own site, questions about drupal are sometimes ported to the drupal site while the response on SO is better.
and then there is also programming which also could be merged with SO IMHO.
I guess what I'm trying to say is that it is too unclear where to post a question and getting down votes on those questions isn't a way to welcome new users...
I'm fine with posting a question on a different site to keep it all clean, but it seams odd to allow some sister sites and disallow others. I vote for one format for all sites so all is clear and confusion avoided. Even if that means disappointing some users.
As a side note I must admit that the "apple" stackexchange site triggered me to post my development question.
Why not let developers use this site as well? 'normal' users can unfollow the developer tag and even get support of developers hanging out here with 'user' questions?