Ubuntu 14.04 (Trusty) was shipping libav, but since 16.04 (Xenial) it went back to ship ffmpeg instead. So for Ubuntu LTS users at least, FFmpeg had "won" since

Ubuntu 14.04 (Trusty) was shipping libav, but since 16.04 (Xenial) it went back to ship ffmpeg instead. So for Ubuntu LTS users at least, FFmpeg had "won" since at least 2016