Plan 9 proponents and developers claim that the problems hindering its adoption have been solved, that its original goals as a distributed system, development environment, and research platform have been met, and that it enjoys moderate but growing popularity.
九號計畫的支持者和開發人員聲稱阻礙其發展的問題已被解決，原先作為分散式系統、開發環境、研究平台的目標也都已經達成，而且也慢慢地開始有人採用。