Impersonate got an NC17 release
Beta 4 is out: https://github.com/nextcloud/server/pull/16919
RC 1 is the next to come: https://github.com/nextcloud/server/pull/17067
Official Beta news arrived, although no details and about Beta 2 while Beta 3 was already available: Nextcloud 17 Beta 2 is out!
Update Beta 3 => Beta 4 went smooth, last app I use, without official NC17 release is AppOrder, btu it works without any recognised issues when enabling as “untested app”.