De o site oficial do Ubuntu Budgie :
We offer two stable releases - 17.10.1, and 16.04.3
18.04 is the next LTS and is currently in development - do not use this on production machines. 17.10.1 is the current stable release and follows Ubuntu support cadence - Oct 2017 to Jul 2018. 16.04.3 is community supported - it is supported until upstream ends support (no current plans) and thereafter, as long as budgie-remix users wish to maintain its support.