This article is from 2017 but it perfectly resonates with my GNUstep experience today, sadly.
But judging by the discussions on the GNUstep mailing lists over the course of the year this gap has been recognized and people have started working on it.
Apparently, this is not enough because there is a shortage of helping hands. May this submission serve as a reminder to people interested in GNUstep to help making a difference.