I saw a Wikipedia article (and not only this one) using the verb "to mothball" to denote rather obsolete, abandoned, put-on-hold methods or phenomena, e.g.:
So by 2003, the original ECMAScript 4 work was mothballed.
Is the usage of a phrase like "to mothball something" or "X is mothballed since Y" is appropriate in formal context, e.g. in technical documentation, legal papers or in a scientific manuscript?
Also, is this verb is used for people or animals?