Since python-r1 is stable now and should replace p-d-ng completely, let's start planning its removal.
Current users in-tree: floppym@naomi ~ % qgrep -l python-distutils-ng app-admin/salt/salt-0.10.5.ebuild app-emulation/vboxgtk/vboxgtk-0.8.0-r3.ebuild app-emulation/vboxgtk/vboxgtk-0.8.2.ebuild app-misc/trash-cli/trash-cli-0.12.9.14-r1.ebuild app-portage/gentoopm/gentoopm-0.2.5-r2.ebuild app-text/fbless/fbless-0.2.2.ebuild app-text/fbless/fbless-9999.ebuild app-text/keepnote/keepnote-0.7.9-r1.ebuild dev-java/javatoolkit/javatoolkit-0.3.0-r8.ebuild dev-python/django-annoying/django-annoying-0.7.6.ebuild dev-python/django-celery/django-celery-3.0.10.ebuild dev-python/django-celery/django-celery-3.0.11.ebuild dev-python/django-celery/django-celery-3.0.9.ebuild dev-python/doit/doit-0.16.1.ebuild dev-python/flask-evolution/flask-evolution-0.5.ebuild dev-python/miniupnpc/miniupnpc-1.7.ebuild dev-python/python-gnupg/python-gnupg-0.3.0.ebuild dev-python/python-gnupg/python-gnupg-0.3.1.ebuild dev-python/python-mpd/python-mpd-0.4.2.ebuild dev-python/python-mpd/python-mpd-0.4.3.ebuild dev-python/python-slip/python-slip-0.2.20.ebuild dev-python/python-slip/python-slip-0.2.21.ebuild dev-python/xhtml2pdf/xhtml2pdf-0.0.3.ebuild dev-python/xhtml2pdf/xhtml2pdf-0.0.4.ebuild dev-util/gdbus-codegen/gdbus-codegen-2.32.4.ebuild dev-util/ninja-ide/ninja-ide-2.1.1-r1.ebuild media-gfx/postr/postr-0.12.4.ebuild media-radio/radiotray/radiotray-0.7.3-r1.ebuild media-radio/radiotray/radiotray-9999.ebuild www-apps/nikola/nikola-4.0.1.ebuild www-apps/nikola/nikola-4.0.3.ebuild www-apps/ownpaste/ownpaste-0.2.2.ebuild www-apps/ownpaste/ownpaste-9999.ebuild
Marked as @DEAD and last rites sent.
And removed finally. Now I can sleep peacefully.