Apart from that, I saw, that you now offer "Ubuntu 16.04" for Plesk Onyx on "autoinstall.plesk.com" - mirrors ( as for example "ftp://ftp.hosteurope.de/mirror/autoinstall.plesk.com/PSA_17.0.14/dist-deb-Ubuntu-16.04-x86_64/" , not on the official Plesk "autoinstall.plesk.com" ), but not for Plesk 12.5.30. Am I assuming correctly, to expect an earlier Plesk Onyx Stable release, than the official support for Ubuntu 16.04 for Plesk version 12.5.30 ?
Ubuntu 16.04 is quite different from its predecessor, so porting it to Plesk 12.5 would be difficult. For that reason, we have no plans of introducing Ubuntu 16.04 support for Plesk 12.5. However, Plesk Onyx will fully support Ubuntu 16.04 x64.