Is Immutable.js inactive/dead?

&quot;Immutable.js is still used heavily both within Facebook and in the broader dev community.&quot;<p>That does not mean it is alive. It certainly looks like it is dead (dead as in it is commonly used when referring to a project that was abandoned), specially since it is backed by Facebook and the last commit was a change on the readme file done in Sep 19, 2016 :&#x2F;