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This seems to be a regular occurrence, judging from this post and this one as well but why does Sagemath not get packaged for 20.10?

Is it always left out of the October releases?

I've managed to install using their Linux binaries but it was a rather unpleasant surprise to upgrade and then discover that I've lost an important application.

Sean Fitzpatrick
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    From https://wiki.debian.org/DebianScience/Sage: "Some people within DebianScience have again packaged Sage for Debian. This is one of the most complex packages in Debian and will need continual maintenance - we are always looking for new contributors!" If you really want sagemath to be available, consider contributing some effort to the Debian Science Team. – Nmath Nov 15 '20 at 20:05
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    Does this answer your question? Sagemath in Ubuntu 17.10? TL;DR: Too many dependencies, not enough contributors – Nmath Nov 15 '20 at 20:07
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    I suspected as much. But wondering if there's any official policy to only bother packaging for LTS; i.e., if there's a predictable pattern to when it does/doesn't get included (LTS only?) or if it's just a case of doing it when the dependencies work out. – Sean Fitzpatrick Nov 16 '20 at 05:07
  • It's a case of who will step up to put in the work. Usually this is left to the developers of the software (package maintainers). There are only a handful of packages that are actually maintained by Canonical (the company behind Ubuntu) and those tend to be system critical packages like the kernel, package manager, security, etc. See: https://askubuntu.com/questions/151283/why-dont-the-ubuntu-repositories-have-the-latest-versions-of-software and https://askubuntu.com/questions/89400/who-compiles-all-the-packages-that-are-part-of-ubuntu – Nmath Nov 16 '20 at 05:27
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    If it's truly "one of the most complex packages", the package maintainers may have decided that it's not worth the effort ($) and time ($$) to support the software on standard releases, since they come out every 6 months. But you still might be able to compile from source: https://www.sagemath.org/download-linux.html – Nmath Nov 16 '20 at 05:31

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