+* systemd-nspawn -M should look for gpt images if neither -D nor -i are specified.
+
+* systemd-nspawn -i should run things read-only if image file has no writable bits
+
+* systemd-nspawn -x should support ephemeral instances of gpt images
+
+* systemd-import pull-gpt should make a read-only download, plus a writable reflinked copy
+
+* machinectl list should show crtimes of snapshots and GPT images
+