The Debian upstream is crazy out of date for almost everything. I get why, I understand the thinking, but they have a point.

At some point vendors - especially open source vendors with limited (volunteer) resources have to call time on supporting older versions. If you're running an unsupported version, and the new version is free to download and install, why would they go out of their way to support you? Their thinking is quite reasonable: it's your choice to use a distro that doesn't track releases frequently, pull down and build a later version from them.

And looking at the release notes 6000+ changes have probably happened since your release. How can they possibly support you and a few thousand Debian users in that scenario with such a small team so focused on so much work?