That's right. This is probably less of an issue for en.wp, but on smaller Wikipedias some of the projects are not active: for instance, we have relatively active projects on biology and pharmacology, but virtually a dead project on chemistry and physics. If I get a strange atricle on physics/chemistry, I would like to have a chance to ask at a meta level, may be assisting with the translation.
Since we have to fill in the weekly report, can we may be start formulating this wiki project proposal? It looks like a real good idea for a broader discussion. Can it be that these projects have been created previously and failed?