What about users of the languages? 1
If a language is “dead” (extinct), there are no user communities or individuals (except researchers who study the languages).
If a language is “dying” (seriously or very seriously endangered), the few users are elderly individuals, “grandparents”. They may or may not form a user community. The “parent” generation may know some of the language receptively. Most children do not know the language, even receptively. Thus there are very few productive users.
Here it is the non-users or receptive users who need LHRs most.