Comment 23 for bug 1853914

The code is currently not in the "release" branch yet.

You can test it using the "experimental" branch...

    $ sudo apt autoremove --purge cubic
    $ sudo apt-add-repository --remove ppa:cubic-wizard/release

    $ sudo apt-add-repository ppa:cubic-wizard/experimental
    $ sudo apt update
    $ sudo apt install cubic

Although the new features seem to work well and are very stable, there are some minor bugs to fix, and through testing is necessary before it can be officially released.